Windows Vista Problem installing XP on a Vista Machine

Hey, Im donig this for a friend.
I inserted the XP cd and the setup popped up. But it wont let me click on Install windows XP (i wanted to select upgrade). So I created a new partition with 10 GB of space (by shrinking the one that has vista running). I then rebooted the comp and then started the windows XP setup and selected that partition. I dont know why but for some reason I selected to format the partition, again, although i formatted it before the comp was off.
Anyways, then it copied the files and when it was going to restart it gave me this when loading - "An error was found in the drive" or something like that. Just that message, white font on black screen in the top left corner.
Since its not mine but my friends I really want to fix it as fast as possible.
Thanks!

 

Hey,
I formatted the whole drive...everything is fine now.