Compaq restore to XP MC from Vista

Hi,
I have a Compaq Presario SR2032X that I bought a month ago. My school gave us Vista Business through MSDNAA so I upgraded from XP Media Center which was already on it. The problem is that I still have all of the backup files on partition H: but I no longer have the factory software (which was in XP media center) to begin the restore. I am wondering if I can do a command line restore at startup in order to repartition to run multiple OSes. In other words, if it is possible, which file must I run at the command line in order for the restore to begin? Thanks in advance for the help!