I haven't tried working with good games on Win98 on a good computer in a long time. That's not to say that Win98 completely sucks, but it
is 7 years old now. I still have to work with it on some computers, but I don't play games on them.
IDK about stability, but the game should run fine as long as all of your drivers are good. Maybe somebody can recommend specific builds for Win98.
If you want to up your stability, you can try replacing your shell (a good example would be Litestep, which I run on the one Win98 computer I use). Litestep is free, but I don't recommend getting any other themes than the default when using it on Win98; many of the others freeze or crash the computer. The site is
www.litestep.org, and it requires free registration. I have had some trouble with the site lately, though, so if you can't access it I'll try to upload the build I have to one of my Comcast PWP accounts.
EDIT: lol...too many people here. Sin beat me to the punch.