<< What apps/games don't work on XP? >>
I installed it yesterday. My NIC (ORiNOCO USB Wireless Card) doesn't work, and my sound card (Herc. Game Theater XP) is flakey.
<< Also, I heared you can change an enviorment for an app you wanna run, what's this? >>
I think you're referring to the compatibility that XP uses, meaning you can run programs in 95, 98, NT, or 2K compatibility mode.