Hi Joe
I guess the first place you could start looking in is the Windows 98 Support Center..
http://support.microsoft.com/default...d=fh;EN-US;w98
What new hardware are you trying to install? It may be worth your while to disconnect the new piece of hardware and restart the machine.. See if everything is ok.. (ie no errors appears during boot up and login).. Try to run the "Add new hardware" wizard again (without the hardware attached) and see if the same error regarding the missing inf file appears.. If it does then it sounds like your windows 98 might have gone a bit screwy and has nothing to do with the new hardware that you are trying to install..
Also you could try to visit the manufacturer's website and see if there is any mention of the same probelem in an FAQ. If that should fail then drop their support a mail detailing your problem and hopefully they should come back with something..
Hope this helps..
Kevin
kevindelaney.com