|Uninstall them. If you can't do it from normal mode then try it from safe mode. (Before the OS starts loading start tapping F8 and choose that option from the menu that comes up.) If you still can't do it because you're getting the OE even in safe mode then reboot and use F8 again and this time choose 'command prompt only'. At the c:\> prompt type SCANREG/RESTORE and enter. Choose a registry to restore with a date that precedes your installing the drivers.|
What version of 98 are you running? If you don't know, you can right click on 'my computer' either from normal or safe mode and post back what it says about the operating system. Or if you can't get to the desktop then from 'command prompt only' type DIR C:\COMMAND.COM and enter and post back the date associated with that file.
Where did you get the drivers? Are they the ones specifically for that flash drive?