T2 w/ XP Crashes After Mission Screen! Help!

[magnum0766]

Before downloading Windows SP2, I played Thief 2 Gold with no problem on my XP desktop. Now, I can't play it! Thief 2 installs without incident, I get the mission overview w/ Garrett's voice over, and the mission screen. Then the game starts looking all pixilated, as if the game is running in safe mode. About 2 seconds later, it crashes, with a Windows error message. I tried looking at some of the fixes on these threads; tried removing the ; from the ;safe_texture_manager in the Thief 2 folder. I tried doing the Start - Run - D:\setup.exe -lgntforce, still no luck. Chose the "install Direct X 7" option during install. I'm stumped. Anybody out there know what to do?

HP Pavillion 752
Intel(R) Pentium(R) 4 CPU 2.00GHz
1.95 GHz Processor
512 MB memory
Intel(R)82845G/GL/GE//PE/GV Graphics Controller