Get Ranish partition manager; place it on your 98 boot disk, run Part from the Cmd prompt and choose to zero wipe the drive & MBR.
Then simply reboot and install whatever OS you wish.
The command promt in XP ( and NT/2k ) is run with " CMD ", or in XP's case you can also use the standard " Command " in the run box.
NO Windows version will let you format the current partition that Windows is using; to wipe an OS you have to be outside the current mount.
MS didn't make XP any harder to use to do a Disk Format than NT/2k. Simply boot from the CD and choose the format option avaialable to you after you have determined your partitions.
If you want to use the XP CD to remove the current installed OS, simply boot from the CD and delete the current partition(s), then reboot and use your OS media of choice to recreate the necessary partition(s) and file system.
Read in a message board of a local BBS: "I try to avoid using Microsoft. That's why I use MS-DOS."