Hi Adrian
> I have recently migrated on of our moodle 1.9 systems to 2.2
> ... had to ... copy the hot pots over manually
Oh dear. Why did you have to do that? As long as the HotPot files are available during an upgrade from Moodle 1.9 to Moodle 2.x, then the HotPot activities and files should be available in the new Moodle 2.x site.
Gordon