Frank,
For me on my Windows 7/64 system the path to all Photo Mechanic preferences is:
C:\Users\kbaker\AppData\Roaming\Camera Bits, Inc\Photo Mechanic\
You'll see folders like IPTCDialogSettings and IngestDialogSettings, etc. Inside those folders are your snapshots. You can simply copy all of the Settings folders over from your door stop drive to your new drive.
HTH,
-Kirk