[hcp006sl]

Now what you have already done is impossible to manage.
Well, if possible take another HDD, connect it to your computer (as SATA/PATA according to the config. of the disc). Use Seagate Disc Wizard to copy your HDD to the newly installed one. Now remove that one. Format your own HDD. Again copy the backup copy of your disk to your disk with Seagate Disc Wizard.
Always remember you can change the volume of any partition excepting for the system partition. For this you won't need any DM, just XP itself is enough for this.