Well, I presume, first one has to create the same track as the original at the
destination object (Add Property Tracks / Rotation / All or H, P, B).
Then select the original Track / Keyframes (Shift + Click).
Then Shift + Control and move this track to any other object and time.
(You might find it easier to open all tracks before moving them to a new destination)
Well, I am not quite sure yet if possible how to set up keyframes controlling other tracks.
Cheers
Nolan