With all those display card changes, I'd say you almost certainly have driver corruption issues, especially as you've changed to and fro between NVidia and ATi cards. Bits 'n' pieces of drivers get left behind and make a mess.
A Format and clean install is in order I believe, especially if you've had Windows Me, 'upgraded' over the top of it to have Windows XP, and then 'reverted' back to Me.
Windows Me is the WORST version for games to start with
If I'm correct, you really need to wipe that hard drive clean and start over
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Grandad
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since Mar 2004