Thanks Hickory, I found the FixPack you posted a link to earlier in the thread which seems to have compiled and repackaged Baldurdash and Dudley's fixes among other things. I'll be using it together with a partial Unfinished Business installation.

Also, does the GOG version of the Original Saga have the duplicate music files bug? I remember the 3CD version had it...

No.

Thanks for this guide, especially for all the links to the mods and utilities!

I've noticed that the NPC portrait pack link is dead. I haven't looked into whether the pack has moved its site, or whether G3 took it down for good, as I don't exactly know which portrait pack this was.

Another thing: has GOG implemented the Baldurdash and Dudley fixes into its version? How did that happen, they weren't official, were they?

It's a simple typo in the url (a missing 's'). The url should be:
http://www.gibberlings3.net/bg1npc/portraits.php No. Dudley fixes in particular have many arbitrary changes, and cannot be recommended for a 'vanilla' experience.

I see. I thought I read that Baldurdash was already implemented in the GOG version.

I just insalled BG1+BG2 along with the listed mods (all except ones listed under "Optional") in OP. This is the error I get on start up (check attachment). All mods have been installed in BG1 folder.

Any and all help would be most appreciated.

1. Where is you game installed to?
2. Please copy/paste the contents of your weidu.log here.

1. C:\GOG Games\Baldur's Gate

2.

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~WIDESCREEN/WIDESCREEN.TP2~ #0 #1 // Widescreen Mod -> for GemRB: Widescreen Mod v 3.06
~BG1UB/SETUP-BG1UB.TP2~ #0 #0 // Ice Island Level Two Restoration: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #1 // The Mysterious Vial: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #2 // Additional Elminster Encounter: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #3 // Angelo Notices Shar-teel: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #4 // Finishable Kagain Caravan Quest: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #5 // Coran and the Wyverns: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #6 // Kivan and Tazok: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #7 // Branwen and Tranzig: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #8 // Safana the Flirt: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #9 // Appropriate Albert and Rufie Reward: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #10 // Place Entar Silvershield in His Home: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #11 // Scar and the Sashenstar's Daughter: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #12 // Quoningar, the Cleric: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #13 // Shilo Chen and the Ogre-Magi: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #14 // Edie, the Merchant League Applicant: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #15 // Flaming Fist Mercenary Reinforcements: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #16 // Creature Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #17 // Creature Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #18 // Creature Name Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #19 // Minor Dialogue Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #20 // Audio Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #21 // Store, Tavern and Inn Fixes and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #22 // Item Corrections and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #23 // Area Corrections and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #24 // Permanent Corpses: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #25 // Elven Charm and Sleep Racial Resistance: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #26 // The Original Saga Music Playlist Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #27 // Sarevok's Diary Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #28 // Prism and the Emeralds Tweak: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #29 // Duke Eltan in the Harbor Master's Building: v13.1
~BGQE/SETUP-BGQE.TP2~ #0 #0 // Installing the Slime Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #1 // Installing the Beregost Family Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #2 // Installing the Babysitting Quest, including the Carnival Encounter...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #3 // Installing the Nashkel Monster Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #4 // Installing the Fallen Paladin Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #5 // Installing the Undying Love Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #6 // Installing the Orcish Lover Encounter...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #7 // Installing the Unexpected Help Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #8 // Installing the Quest "Many little paws"...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #9 // Drunk near Beregost Temple: 9
~BW_HERBS/SETUP-BW_HERBS.TP2~ #0 #0 // Herbs and Potions Add-in (BG1 / BG1Tutu / BGT) by Baronius: v1.0.3
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #10 // Remove Helmet Animations: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #20 // Weapon Animation Tweaks: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #30 // Icewind Dale Casting Graphics (Andyr): v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #50 // Icon Improvements: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #60 // Force All Dialogue to Pause Game: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #70 // Make Magic Shields Glow (plainab/grogerson): v5

i-Lo, the installation order of your mods is wrong. I'm not sure this is indeed the cause of your problem, but I would recommend to reinstall the game and then the mods in the following order:

BG1 Mini Quests and Encounters
Herbs and Potions Add-in
BG1 Unfinished Business
BG1 Tweaks
Widescreen Mod

In particular, it is important to install the Widescreen Mod last. Besides, it looks like you may have chosen the wrong installation option for the Widescreen Mod, i.e., unless you are using GemRB, but according to the screenshot you posted this doesn't seem to be the case, you should select

1] for the original Infinity Engine (CHOOSE THIS!)

and not

2] for GemRB

Yes, it's definitely the widescreen mod causing this error. It *must* be installed last, and you *must* choose an installation option and resolution that the widescreen mod supports, and never change game resolutions once you have the WS mod installed. Also note Ergos' comment about GemRB.

Thank you both. It is working now, however, prior to starting I get an error stating "Tales of Sword Coast has stopped working". Subseqently, all else remains fine.

Make sure you have adequate permissions, temporarily disable your antivirus (while playing games), and ensure that the game shortcut runs BGMain.exe and not Baldur.exe .

I ran it as administrator, antivirus is on silent mode (avast) and the file the short cut accesses is indeed BGMain.exe. The issue still persists.

Here's the WeiDu:

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~BG1UB/SETUP-BG1UB.TP2~ #0 #0 // Ice Island Level Two Restoration: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #1 // The Mysterious Vial: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #2 // Additional Elminster Encounter: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #3 // Angelo Notices Shar-teel: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #4 // Finishable Kagain Caravan Quest: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #5 // Coran and the Wyverns: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #6 // Kivan and Tazok: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #7 // Branwen and Tranzig: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #8 // Safana the Flirt: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #9 // Appropriate Albert and Rufie Reward: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #10 // Place Entar Silvershield in His Home: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #11 // Scar and the Sashenstar's Daughter: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #12 // Quoningar, the Cleric: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #13 // Shilo Chen and the Ogre-Magi: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #14 // Edie, the Merchant League Applicant: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #15 // Flaming Fist Mercenary Reinforcements: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #16 // Creature Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #17 // Creature Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #18 // Creature Name Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #19 // Minor Dialogue Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #20 // Audio Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #21 // Store, Tavern and Inn Fixes and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #22 // Item Corrections and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #23 // Area Corrections and Restorations: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #24 // Permanent Corpses: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #25 // Elven Charm and Sleep Racial Resistance: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #26 // The Original Saga Music Playlist Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #27 // Sarevok's Diary Corrections: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #28 // Prism and the Emeralds Tweak: v13.1
~BG1UB/SETUP-BG1UB.TP2~ #0 #29 // Duke Eltan in the Harbor Master's Building: v13.1
~BGQE/SETUP-BGQE.TP2~ #0 #0 // Installing the Slime Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #1 // Installing the Beregost Family Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #2 // Installing the Babysitting Quest, including the Carnival Encounter...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #3 // Installing the Nashkel Monster Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #4 // Installing the Fallen Paladin Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #5 // Installing the Undying Love Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #6 // Installing the Orcish Lover Encounter...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #7 // Installing the Unexpected Help Quest...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #8 // Installing the Quest "Many little paws"...: 9
~BGQE/SETUP-BGQE.TP2~ #0 #9 // Drunk near Beregost Temple: 9
~BW_HERBS/SETUP-BW_HERBS.TP2~ #0 #0 // Herbs and Potions Add-in (BG1 / BG1Tutu / BGT) by Baronius: v1.0.3
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #20 // Weapon Animation Tweaks: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #30 // Icewind Dale Casting Graphics (Andyr): v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #50 // Icon Improvements: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #60 // Force All Dialogue to Pause Game: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #70 // Make Magic Shields Glow (plainab/grogerson): v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #3000 // Higher HP on Level Up -> Maximum: v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #3010 // Maximum HP for NPCs (the bigg): v5
~BG1TWEAKS/SETUP-BG1TWEAKS.TP2~ #0 #3160 // Sellable Staffs, Clubs, and Slings (Icelus): v5
~TWM_GUI/SETUP-TWM_GUI.TP2~ #0 #96 // Small GUI modification for BG1 640x480 by Lava Del'Vortel -> Yes, the whole component.: v0,994
~WIDESCREEN/WIDESCREEN.TP2~ #0 #0 // Widescreen Mod -> for the original Infinity Engine (CHOOSE THIS!): Widescreen Mod v 3.06
~TWM_GUI/SETUP-TWM_GUI.TP2~ #0 #97 // Better GUI for BG1 with WideScreen Mod in higher resolutions: v0,994

Thanks for your assistance thus far.

Are you loading an existing save game, or starting a new one? With the widescreen mod, you're better of starting again, because any errors from previous sessions are stored in the saved game.

Also, Avast can be a royal pain in the backside when it comes to games. You might want to consider an alternative, or completely disable/exit it when playing games.

Yep, looks like Avast was the trouble maker. Thanks for all the help.