How old is the PC? If it is more than a year or two old, then there is a very, very good chance that windows 98 will autodetect and install drivers for you.
If it's a newer PC, then you can probably pull all of the drivers off of HP's website and do a "normal" win98 install and then install the drivers that you downloaded.
If you do a recovery from the HP disks, then the drivers should load themselves.