Make sure you have CD and product code and a bootable floppy with CD drivers (make a win98 rescue disk from control panel)back up any data you req. off drive.
Reboot with floppy in drive run A:\Fdisk and make a primary partition large enough for Win98se (whole disk). Run A:\Format C: /s this will copy system files to C:\ drive. Run E:\ setup to install win98se (note e=CDrom drive drive letter pushed back one letter as bootdisk has created a ram drive for the tools)