You can do what Savage said that would be the easiest to get you started.
If it were me, I'd restore for the original restore CD. This way all your hardware drivers etc are installed for you. Then run the 98 upgrade CD.
This way you do not have to figure out what hardware you have and spend allot of time looking on the Internet for drivers.
Unless of course you have all the drivers for your modem, sound, video etc already.
Just an afterthought. :
