SimTheme Park don't run worth a **** on XP. I can't get it to work barely at all. I have been able to play the quick missions, but I can't play the carreer, and it seems that if I try the carreer too many times, I can't even get in far enough to play the quick missions either. Other than that, I've had 0 problems with any other games, including: Everquest Red Faction B-17 Freespace 2 Operation Flashpoint Pool of Radiance 4x4 Evolution Unreal Torney (Infiltration) Half-Life (including most mods) Ceasar 3 Thief Motocross Madness No One Lives Forever Mech Commander 2 And quite a few others that I've since uninstalled since I've passed em. I run NTFS and have seen no problems at all, except with a few minor/older games, but it's not due to NTFS at all.