Speaking of Windows Update, and it's ending support for 98, there is a way you can still get some of those updates. If they are going to continue or not, I'm not sure. All you need is FireFox, and go to windizupdate.com.
It's a FireFox based windows update site, in which you can get updates for Windows 98. http://www.windizupdate.com/
This link may help with the reigistry: http://www.onecomputerguy.com/win98_...sconfig_remove
It may, as you should have to type regedit32 to get into the 9x registry. This says regedit, which is 2k and up. I'm looking around some more though.