4) This is where it gets tricky. If you want to put your old HDD back into the drive bay to use as a second drive, then you must first get rid of it's boot attributes, Windows will not boot with 2 cloned drives that have the same attributes, you will get a BSOD the moment you plug your old drive back in. To do this you must delete the entire partition on the old drive and reinitiate it.
Two ways of doing this. Easy way is simply to plug the old HDD into another PC via sata and molex, and just delete the partition using windows disk manager.
Second way is only if you have no other means of plugging in the old HDD to another PC. You will need to plug the HDD into your X220 and use Windows Installation CD to boot into an installation environment. From there you can delete the partition on the old HDD and reformat for NTSC.
Remember once you use Thinkvantage Rescue Recover to reinstate your C drive onto your msata ssd, you can no longer plug your HDD back into the bay without first deleting the HDD partition. Windows will BSOD everytime as you will have two drives that look identical.
You do not need to delete the partition and lose your data: there is yet another way
You can simply mark the Windows 7 partition on the regular HDD as inactive.
Easiest way to do this is to put the HDD in a USB enclosure then connect it only after boot.
To change it to inactive:
Open up a command prompt in Windows 7 (type 'cmd', no quotes, in the search box)
In the command prompt
Type LIST DISK
Type SELECT DISK n (where n is the number of the old Windows 7 drive - you can identify it by size or label)
Type LIST PARTITION
Type SELECT PARTITION n (where n is the number of the active partition you wish to make inactive)
Type EXIT to exit DISKPART
Type EXIT again to exit the command prompt
Disconnect USB drive as you normally would
Install HDD back in laptop
Bob's your uncle.
The beauty of this approach is that if you ever want to use the regular drive again as a boot drive, all you have to do is carry out this process and set the drive to "Active"