You could open the "Animation Palette" window, mark the object at frame 30 with a mouse-click, optional you now can key frame it by clicking on the + sign in this window, copy it from frame 30 with "ctrl + c" and paste it with "ctrl + v" to frame 1. After that, you set the frame count  1 to 1 (you'll be getting asked by the programm, if you're sure you want to del. the frame, since this is undoable). Basically it's just copy and paste things over and deleting unnecessary frames.

(PP2012)

 

edt ... x-post with markschum =)