if you know the make/model of the parts you are trying to install drivers for, you could go to thier web site and download the windows98 drivers,
also save these drivers for future reference.
if you dont know the details of the parts then you could download Belarc Advisor click here, install and run, it will tell you the make/model of all the hardware in your computer
write them down and then source the drivers , save them and install them
Another way would be to re-install ME, use the restore disk, then make a note of the hardware, go and find windows 98 versions of the drivers, then format and install windows98 (a longer way round but at least you will get the right drivers)