The Windows 98 SE hard drive is formatted in FAT32 (File Allocation Table 32 bit). An XP drive should be formatted in NTFS (NT File System). Some early XP Home computers were formatted in FAT32. With a fully updated (use the Windows Update website) XP to SP2 system, you will be able to read data on a slave FAT32 drive. A FAT32 Winows98 SE OS can't see an NTFS drive... Good luck with the new board. What did you get?