More on W7 vs. IDE vs. MBR vs. ACHI, vs. GPT.

New MB, new W7 HDD and old W7 HDD. It dawned on me that the old HDD was formatted
MBR IDE SATA and not MBR ACHI SATA. Since the new MB does not do IDE/ATA/PATA
it would not allow booting from the old HDD. I used regedit from the new
W7 GPT drive to hive access the registry on the old W7 drive and change
the MSACHI line from 3 to 0. Now I can boot from the old HDD using ACHI/MBR.
Next I'll clone the new GPT drive to the old drive and then attempt to change
the old drive from GPT to MBR. If all that works then I'll clone the
XP3 drive to a spare drive and attempt to change it to ACHI if I can find
some XP3 ACHI drivers. It's interesting that the same authorization code
now works on both W7 drives.