I've attempted installing BG1 Widescreen and GUI mods but there's always a problem. If it isn't unreadable text it's the fact that the game lags too much, or edge-scrolling breaks. I just can't seem to mod BG1 into an enjoyable state at all :(

I want to keep the BG experience as vanilla as possible, but at the same time I need the text to be readable, and I also need edge scrolling to work correctly as I simply can't enjoy a game that doesn't function as intended (which has sadly ruined my enjoyment of a LOT of games. It's just the way I am.)

Please, please help :(

If you're playing vanilla BG1 (ie. not TuTu or BGT), then pick a widescreen resolution that fits your monitor's aspect ratio, but isn't too big to make the text unreadable. For example, if your monitor is 16:9, then a resolution of 1024x576 will be perfectly adequate -- don't go the full native resolution. Also, don't pick non-standard resolutions if you want to play in full screen -- they do work in windowed mode, though.

You can install bigger fonts if you are having trouble reading the text.

http://www.shsforums.net/topic/38626-bigger-fonts-for-bgiitob-and-other-ie-games/

When you go into game options, you can find a setting that will slow down scroll speed.

On my 27" 2560x1440 screen I found I get the best results by using widescreen mod set to exactly half my actual vertical and horizontal values, with no other mods.

PS. you could also try BG:EE. I checked it out and they did really well with the resolution and UI

Doh, I failed in reading and thought he was having issues in getting TuTu/BGT to look proper on his screen, didn't even realize s/he was looking at BG1 vanilla...
Yea, there is really no point in playing BG1 vanilla when Tutu, BGT, and BGEE exist