Long story short: Windows 7 SP1, Home Premium, machine, old XP HDD connected with adapter. Imaged old HDD, and reimaged to new/W7 one.
Added XP entry to EasyBCD. From boot menu, XP would get to loading screen, but after which the machine would restart. Learned that I should "adjust" the OS with Paragon software.
Created bootable Paragon media, which informed me that it needed to inject certain drivers before adjusting. It listed one device as lacking drivers in particular:
Standard AHCI 1.0 Serial ATA Controller.
I searched for drivers on the Intel site, and downloaded several, but in particular all of
http://downloadcenter.intel.com/SearchResult.aspx?lang=eng&ProductFamily=Chipsets&ProductLine=Chipset+Software&ProductProduct=Intel%C2%AE+Rapid+Storage+Technology+(Intel%C2%AE+RST.
(Note that the ones I downloaded were all listed on the site as compatible with
XP Media Center Edition, which is the variant of my old XP.)
I booted with the Paragon software again, but after checking each downloaded driver it continued to assert that the required driver was missing.
So, my request would be for help finding the appropriate driver.
Thanks in advance.