If you're after a boot cd with decent disk management, google Ultimate boot cd windows
It's basically going to give you (using your existing windows CD (iirc it works with an OEM CD)) a version of XP installed on a CD. You boot from the cd, then you can format the HDD/ Fdisk it to your heart's content as you've got nothing installed/running on it. After that, you should have a shot at installing 98 from the CD (easier if you have 2 cd drives though!)