Check your AGP 4-in-1 version (see first post in this thread) and make sure you have the latest. Then, follow the XP guide I've linked in that first post to optimize your software settings. Next, if you're overclocked then wind back your overclocks. What you're describing sounds like a graphics card that's been overclocked too far. If your problem's occuring at default clock then check your AGP Aperature Size in BIOS (make sure it's 128MB) and set AGP Driving Value to Auto. Texture corruption can also occur due to heat on the graphics card, but its mainly from overclocking. Let me know more details and we'll take it from there.