I recorded some relatively acrobatic stuff and some parkour

1. Is there a way to lock bones when re-tracking? IE I have tracked something and a bone locked up and propagated to the next few frames, I want to fix it after the motion blur or occlusion and track backwards, but if I do it sometimes messes up the tracking of other body parts that tracked properly while tracking forward. If I could lock those bones out and make the computer focus on the messed up ones it would make fixing these little errors much easier.

2. Is there a way to manually set motion controller orientation if I have orientation information from the same shoot/calibration? In some takes the actors forgot to look at or point at the damn camera, but I have good orientation info from other tracks with the same setup...