well if you aren't afraid to lose data you can always just reformat the partition, that should fix it if all u messed up was partitioning
This post was placed over 5 months ago. Very unlikely that the original poster is around.
To answer tho, I would just reinstall with the XP discs after backing up the data from the drive with Parted Magic from UBCD disc.
Visit the UBCD Wiki: http://wiki.ultimatebootcd.com
Please check your UBCD
ISO MD5 Hash Sum
; May prevent issues later on by not having an exact copy.
Currently Working on Common Issues and Repair Tips
on the Wiki.