I'm sorry, I'm just a mixed up person today because I am so excited to play Fallout 2 that I pee-pee'd all over myself. But thank you anyway for the info - I'm sure it will come in handy in the future. The process that I quoted was something that necessarily had to be done in order to prevent a persistent graphics glitch when playing Fallout 1 on XP.
I'm having another problem and I will start a new topic for it, as I think it might be of use to others who want to play Fallout 2 on XP.
Ah, I see. Well good luck.
Incidentally, I haven't noticed any graphic issues with Fallout or Fallout 2 on Windows XP but that may be because I'm using the versions from http://www.gog.com/en/frontpage/