Updating Vista/Win7 Dual boot with Clean

I have my current system with Vista x64 on the C drive dual-booting with Win7 RC installed on the F drive.

Is there a way to install the Win7 RTM to my C drive without destroying my Win 7 RC version? I want to leave it there until I have everything installed and working. Then I can format the F drive and start clean.

Or would it be better to just add the new Dual-boot to C drive and then remove the old Vista?

Thanks in advance.

dont wrry, installing win7 rtm on c drive will not destry the F drive version. The boot loader will detect both

Thank you Sparkie. It worked exactly like you said.

you welcome D;