How do I copy a board outline from one file to another?

I managed to screw up my board outline, which lives on the dimension layer. I have an older file that has the un-mangled version and I would like to copy it from that file to the newer file. How would I go about this? It’s not a part, just a series of lines with curves that I don’t want to try to reproduce.

Solved. Eagle 6 copies to the clipboard and can be pasted into another instance of Eagle. Open up both files, copy from one, paste to the other.