I have pre-installed windows XP pro. OS from HP which has come with one system restore CD and OS CD. My problem is that there is only one partition (C

on the 80 GB hard disk. I have tried to create the much needed second partition (D

with partition magic 8 also but failed.
How can i achieve this without formating the hard disk and installing window (from the OS CD) all over again.
please advise me.