Jan Harrigan’s new white paper with details on 7 Options for Replacing FRx is now available. It’s not free but but hey, neither is a Ferrari and frankly that’s what I’d like to replace FRx with.
7 Options for Replacing FRx | FRxBuzz
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.