Change drive letter for upgraded HDD on SSD-OS/HDD-User files setup

I recently set up a new Systemax SYX-1113 PC with a SSD (C:\) for Win 7 Pro and a 1TB HDD (G:\) for my user libraries and programs. I need to upgrade the HDD from a 1GB to a 2 GB drive so I cloned the 1TB (G:\) drive to a new 2TB (H:\) drive. My new challenge is figuring out how to switch the drive letters on the two HDDs so that Windows looks to the new drive for the user directories and program files. I tried using disk manager in Win7 and got the BSOD - I guess it didn't like me changing the location of the active user profile. I assume I need to boot the PC from something other than the C: drive to make the change. Thanks in advance for any suggestions!!

Have you tried just swaping the SATA cables?

Turn off the PC.
Unplug the power supply.
Swap the G: and H: SATA cables.
Plug in, turn on.

That won't work - Windows stores drive letter assignments in its registry, they're linked to the partitions seen on each disk and it won't matter where the physical disk is connected.

For the same reason, you won't be able to change the letters outside of Windows either.

I'd probably boot into a rescue environment and try to edit the Windows registry offline and change letter assignments that way, but it's not easy and the exact steps escape me at the moment.

An alternative solution might be to simply clone your 1TB drive to the 2TB drive again, but this time also from a boot CD instead of within Windows. Then you'd disconnect (or wipe clean) the 1TB drive before booting Windows back up so it doesn't get confused seeing two identical G: drives.

Perhaps someone has a better idea I'm not thinking of. Still early in the morning here and my coffee is slow kicking in.

Well the second time it worked! Thanks essenbe!! Used disk management to change drive letters with no problem.