Here was my situation: I created a composite with several nodes and stuff. (about 100 frames). Then the client wants to add 20 frames of additional footage to the begining.
I thought I can just select all of my nodes and drag them over (i.e frame 20-120) and then just fileIn the additional footage. Then I realized that I couldn't move more then one node at a time. I really wouldn't want to try and move each node independently because then it would be a mess. (tried to group my nodes like a precomp and move that too, but still no luck.)