FWIW:
A few weeks ago, I asked the forum if there was a way to move track motion keyframes which were not attached to events--i.e., not directly under an event. I got a few replies that nagreed with my experinece that it couldn't be done, but I think I've found a way to do it, at least in some cases.
I wanted to import a new piece of audio at the head of a project loaded with track motion. I turned on Ripple edit, set it to apply to all the things it could apply to, and dragged the audio to 00:00:00:00.
Unless I'm too blurry from deadline trance, it worked. Now the project starts at about 00:00:01:00, but at least I don't have to move each keyframe one at a time.
Hope this helps anyone in a similar situation.