It looks as though you had WinXp Home installed to WINNT folder.
When you installed XP Pro you installed it to C:\Windows
If this is the case then Windows XP is a seperate install but the way you have dome it means that both are using the same Documents and Settings and Program Files folders.
That is a bad setup.
If you want to delete XP then you can boot into XP Home and then delete C:\Windows and remove XP Pro entry from the boot.ini
Code:
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Micro soft Windows XP Professional" /fastdetect