I can confirm now that motion detection works as well. I just had a short time to test and tweak it, but I was getting an average reaction time of about 140ms, which isn't too bad. I'll try some more testing later.
The only quite random behavior I came across dealt with the manual flash. If I had the manual flash on, as soon as I set the AF lock, the overrides would be disabled and I would have to go back to the CHDK menu to turn the disable option back off. I really have no idea what relation those two have.
Oh, one last thing. I couldn't get the OSD to be hidden when I go into Play to review the pictures. They still showed up even when I had the Hide OSD in Play option enabled.
Anyways, Many thanks to you snc!