Someone has offered to send me a file that will fix the machine's
internal "identity." In the meantime, however, I had ripped the Recovery
CD, used a hex editor on the resulting .iso file to change the string
for which the Install program on the Recovery CD was looking, then
burned it back to a CD and restored to the original 20GB hard disk. It
did display "Wrong" -- not "wrong Machine!" -- (probably because the
string was a different length, so I put nulls after the CRLF), but
continued anyway.
Now I see what other things I was missing by doing a generic XP
installation: e.g., a SpeedStep utility that slows down the CPU if the
external power is disconnected, a "change hardware" utility specifically
for the SelectBay (for interchangeable CD-RW/DVD, floppy, 2nd hd, and
2nd battery), and a utility to determine what the EZButton does.
Next step is to Ghost the installation to an external drive, then run
the upgrade to XP, Ghost again, then restore to the larger hd.
MB