You can install XP and during the install it will ask to see the 98 CD.

2. Not so good news. While 98% of the time you can disconnect that other drive for safety (DO NOT LEAVE IT ATTACHED) every two times in one hundred people can't get the drive contents to show up again.

Is there a chance you have a backup plan?

Also read what Grif writes at;posts#2968150

Using his advice I have never had to wipe a drive.