You can't FDISK if the only bootable drive is the hard drive. Is the windows 98se cdrom from MS? If not or unless you copied it form Alcohol 120% or similar it will not be bootable. Once in the Cmos you should be able to define the first bot deivice as your ATAPI device..CDRom. But if you get the floppy to work for you, enable the floppy as the first boot device>FDISK>remove primary dos partition>create new primary DOS partition>format FAT 32>install 98SE.
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.