If you're running XP SP2, then you're in for some fun.
What I had to do was install the official patch, then a fan made patch to solve texture problems, then download an older version of the Indeo drivers. Then I had to disable one of the CPU's on the system after I started the game or it locked up. Check this site out, all questions will be answered, and good luck with it.
http://www.ttlg.com/forums/showthread.php?t=75 031#texturememory



