Firstly, becoming a "quad made man" is an exploit (as I'm sure you know), so it's possible that the patch made it more difficult. However, I'm pretty sure that this has nothing to do with Mason detecting you - I'm pretty sure he could detect you before the patch.

Secondly, it's quite possible that the guide you're using is completely full of shit. Sadly, most of the FAQs for Fallout 1 and 2 are crap and full of inaccuracies.

I'd recommend this guide for Fallout 2, especially if you're going to be trying exploits and the like: http://fallout.wikia.com/wiki/The_Nearly_Ultimate_Fallout_2_Guide.

But I'd also check the release notes for the unofficial patch as well, just in case it "fixes" some of them.

Out of curiosity, what bugs have been introduced by the Unofficial patch? I was just about to install it before realizing I installed FO2 in the default directory (apparently the installer doesn't enjoy the x86 version of Program Files either). I was considering if it was worth redoing for it.

Speaking of which, quick note to everyone: it appears the GOG/Steam FO2 installation doesn't use even near to the most recent sfall version (unofficial patch doesn't either). Might or might not be wise to update, it's a simple file replacement.

I've used the Fallout 2 restoration project for awhile and never noticed any bugs being introduced. The current (and final?) version is 2.3.3 and seems very stable and bug-free.

If you install the Restoration Project, you don't need anything else as it already includes the high resolution patch, unofficial patch, and SFall .

The high resolution patch and SFall might still be updated, but when the last version of the Restoration Project was released in July 2014, I believe Killap added the recent (at least then) versions of the resolution patch and SFall. The game was working flawlessly so I don't see the point in looking for updated versions of the resolution patch or SFall.

None of the links seem to be working. Where else can I find these mods?

You can get Unofficial Patch and Restoration Project here:
http://killap.net/

Megamod here:
http://www.nma-fallout.com/resources/mib88-megamod.11/

Resolution Patch:
http://www.mediafire.com/download/7uaa8r5600r9n92/Fallout2_High_Resolution_Patch_4.1.8.zip

Sfall:
https://sourceforge.net/projects/sfall/

New Vision:
http://teamx.ru/site_arc/mods/f2nv12eng.rar

Wasteland Merc:
http://wastelandmerc.atspace.com/

Last Hope (demo):
http://fkmoddingstudio.4t.com/Downloads.htm

Shattered Destiny:
http://www.moddb.com/mods/shattered-destiny/downloads

Very Difficult Mod:
http://www.moddb.com/games/fallout-2/downloads/very-difficult-mod

Unofficial 1.05 Patch:
http://www.moddb.com/games/fallout-2/downloads/unofficial-v105-patch

Thanks!

No problem!

nvm figured it out.

English version of Fallout 1.5 Resurrection mod just released. Haven't tried it yet just thought I would share.
I would post the link but "You cannot post any links at this moment."
Google it :)

Here:
http://resurrection.cz/en/

The link to high resolution patch does not work for me. It just says error.

I want to play in 1920-1080 fullscreen if possible. Currently it becomes a small screen which is a bit annoying. All help would be appreciated.

You can use Unofficial Killap's Patch (or even Restoration Project):
http://www.killap.net/
Hi-Res Pack included.

Fallout 2 Restoration Project does it, just checked.

Although I have another possible problem: Restoration Project's readme says, that to verify, if it installed correctly, I should check both the lower right corner on the main menu screen (the mod version is there - for Restoration Project and something called SFall if I recall, in fact) and click some rock behind Klint, just outside the temple at the start of the game (there, it is not - I clicked all rocks around Klint to be sure, nothing, just the usual descriptions).

I have newest possible version of Fallout 2 installed (just did it today via Galaxy), should I leave it the way it is with RP and this Sfall (what is it, anyway?) or do something, and if so, what? (I was using the automatic installer for Windows, not the manual installation, btw)

Behind Klint (a little lower, on path; when looking at display) should be small rock (type player character can take and use as weapon to hit or throw). When you move mouse cursor to it (without any clicking) there should be information about RP in message screen.

Automatic installation of RP should work correct if Fo2 is in "default" location (e.g. "C:\GOG Games\Fallout 2").