Just to make sure we are working with clen GOG install, reinstall your GOG copy of Fallout from scratch and see if that helps. I don't know if oyu have any fan-made patches.
Also, system specs would be helpful.
Tried uninstalling and re-installing it from scratch. Didn't help. One of the fixes I was going to try is to change that fallout.cfg file or whatever, but I don't seem to see it anywhere. It's like it never downloads and installs properly.
My graphics card is a NVIDIA RIVA TNT2/TNT2 Pro. Not that I have any idea what that means, i'm completely computer illiterate. I have more than enough memory obviously, so I am stumped here.