Both the PRO and the HD 2013 lowrance lake insights will be compatible once Lowrance gets more out to distributors. If I understand correctly it has to be 2013 HD ones, 2012 only work in HDS units.
I found out the 2012 HD Insight Chip only works on the HDS units (not Elite). Not sure about the 2013 versions. I had to exchange the 2012 HD I picked up at the Muskie Expo for the 2013 Pro Chip for my Elite 5. Not sure why it has to be so complicated.