I had been running Bootcamp + Windows XP for a while on my Mac Mini.
Then I decided to upgrade the original 5400RPM drive to a zippier 7200 RPM...
I'm glad to report that:
1. The new drive, a 7200RPM Hitachi 7K100 (100GB version), is a whopping 4x faster than the original Matsushita 5400RPM 80GB that came with the Mini. (26 MB/s versus 6.5 MB/s, according to free "Cosbi OSMark" benchmark).
2. Thanks to this forum, I found out about BartPE and Drive Image XML and was able to successfuly clone the Windows XP partition from the old drive (which I attached via a USB enclosure) to the new drive, and EVERYTHING worked! All Windows XP applications, settings, and device drivers fully restored as if nothing ever happened.
A couple of lessons learned:
1. XP's own "Backup" utility is the most useless backup scheme ever created. Although it has this fancy Volume Shadow Copy feature which allows it to backup system files while they're in use, it has no such functionality on the RESTORE side of the house... So all those system files that were neatly and cleanly backed up CANNOT be restored to their original locations on the system drive, after you've managed to boot up with a barebones install, because all of those same files are locked by the barebones system on which you're trying to run the restore.
2. Attempts to use Ghost 9.0 to clone the partition failed with a mysterious error message about cylinder alignment, about which no further information could be found at the Symantec website. I suspect something in the MacOS's overall drive partitioning scheme confuses this obviously obsolete piece of software.