Moving “System, Active” to another Hard drive

I have two operating systems installed on my computer. One is Vista and the other is Windows 7.

Vista is the original OS on my computer [d:] and I just installed Win7 on a new hard drive [c:].

I am done with my Vista drive and would like to remove it or use it as another backup drive but I can’t remove it until the new c: drive has the System, Active status.

I posted this question in the forums and several people came up with a great idea of:

just place the W7 install DVD into the CD, boot from it and have it REPAIR the BOOT, and all will be OK from there…

So I gave it a try here is what I did (in order).

Below I disconnected the Vista drive and tried to boot from the Windows 7 DVD:

But for some reason it would let me and I kept getting this message.

So then I reconnected the Vista drive and started over, you can see the additional vista drive below (Hitachi):

Then it wanted to run the OS from the hard drives because I was too slow clicking on any key to boot from the DVD.

Above you can see I was finally successful booting from the DVD and I clicked Next.

Above you can see I then clicked on “Repair your Computer”.

Above you can see it started searching for Window installs.

Above you can see it found both and I selected Windows 7 to fix.

Above you can see I selected “Startup Repair” for the Windows 7 drive.

As you can see above it could not detect any problems with the install.

As you can see above using Disk Management that I was not successful moving System and Active attributes over to the new c: Windows 7 drive. It appears that K: was created for the DVD install.

Am I doing something wrong?

Update: I gave up because the registry got serious f%cked up so I started from the beginning and reinstalled Win7 clean.