Uninstall

I set up Rhel v5.5 on my laptop for studies certifications and some test labs.
Today i worked on make partition with command parted , and i make some mistake so i think i delete the Os partition table.
I can't start RHEL anymore even with the Original CD for boot , i try to set up Windows OS via usb not possible same for RHEL (i have also original CD)
I simply want to format my laptop and set up a new version of REDHAT
Now i write the error message;
- Volume group "VolGroupp"not found
Unable to access resume device (/dev/VolGroup00/LogVol01)
mount: could not find filesystem ' /dev/root'
setuproot:moving /dev failed:No such file or directory
setuproot:error mounting /proc:No such file or directory
setuproot:error mounting /sys:No such file or directory
switchroot: mount failed: No such file or directory
Kernel panic - not syncing : Attempted to kill init!
kernel alive