Thanks for the replies.

Thankfully this machine with the XP has FAT 32 as the file system. Now I
want to add the second harddrive from another computer that already has
Win98SE installed on it and use this as the second drive in the subject
machine. If I do this and do something about fixing the MBR will I get dual
boot? Or will I have to reinstall the Win 98 SE on the second drive? Thanks.

Paul