Assuming you have a
98 boot floppy, boot with that. At the prompt, type fdisk and press enter,
delete the non-dos partition, create a primary dos partition, set it active
and exit.
If it says you have no non-dos partition your system is still fat32, delete
the primary DOS Partition, create a new one, set it active and exit fdisk,
reboot the system with 98 floppy in the drive and at the prompt type format
C: and press enter. Once format is
complete, change to your CD-ROM drive and with the 98 CD in the drive,
type setup, press enter and follow the screens.
If you don't have 98 boot disk with CD-ROM support, visit
www.bootdisk.com.