FYI:
Win3 never liked to change desktop colors-res whilst running, was one of the best methods to crash your whole system.
Much better is to work from your dosprompt, quit your windows session and whilst in c:\windows> run setup from there.
Should you need additional drivers:
You'll find all you need@
http://vogons.zetafleet.com/viewtopic.php?t=9405
FYI: the drivers-settings I normally use are:
S3 864 1.45B5 1024x768 256 colors.
Those ol' S3 drivers are almost compatible with everything you throw at, even if they aren't the nicest ones.
(But when a game can run in higher res and I really want something that looks nice I switch to SVGA high res TSENG drivers.)