Sorry, more questions.
1. The Xp cd you used - is it the full version or an updater :-?
2. Did you format the hard disk :-? If so which file system did you select, FAT.32 or NTFS :-?
The first thing you must do is try to backup critical files. If you answer "Yes" to the first part of question 2 then they're gone, possibly irretrievable, but if you didn't format they might be retrievable using a Win.98 boot disk. Is a 3.5" floppy diskette drive installed :-?
Please let us know exactly what you did to "load" XP.