I've been converting more of the PADS layout to eagle, and one of the things that happened was that the layers reversed, i wanted the top side on layer 1, Surprisingly easy to do i edited the XML and changed all layer="1" to layer="16" and layer="16" to layer="1" and that was it. there might be an easier way to do it, but probably not as fast.
exported all the parts to a LBR with exp-project-lbr.ulp and replaced the existing ones in the BRD, next step would be adding the schematic for those parts. if only people would release both files for the EDA package, and not as seems typical a PDF.
Of course one day CadSoft will add a flip view to the board, right ?