Having just tried this it appears I cant install the two extensions together on the same machine.
Question - DFP 2.0 appears to be PHP only. Fine as I am now developing my sites in PHP anyway.
However, I have ASP sites that I have previously built and maintained and after installing DFP 2.0 I can no longer access any of the DFP behaviours OR pick up DFP form fields in the Insert > Update behaviours.
Do I have to install / uninstall / install etc etc when I am managing different sites?