Thanks, that auto-frame command was one of the things I was really looking for but the manual wasn't clear on. The "Use Frame Range" is being a little buggy for me, as you said it may.

One other thing now, which will be handy for changing the middle of animations, is there a way to deactivate the snap-to-grid style of movement so that I can position bones more smoothly? It would simplify tweaking models.