i just installed XP pro in my computer, in my second harddrive (F

, and i have Home in my main drive (C

. And the problem is that i dont want to have Pro anymore. I dont like it, its just not what i want, so i want to uninstall it. I have the CD and everything but i dont want to make a mistake and erase the two or something.
PLEASE HELP..
Carlos
PS: Here is the boot of my pc
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(1)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(1)partition(1)\WINDOWS="Micro soft Windows XP Professional" /fastdetect
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Micro soft Windows Whistler Personal" /fastdetect /NoExecute=OptIn
Now remember that i want to keep Home (Whistler) not Pro