Thank you for the reply.
I ended up just going for it last night and got a copy of the Complete Edition. Note for others: it is part of the BETA build and not available through the 14-day trial.
I got it working by following the tutorial for another Boeing FMC they had a youtube tutorial for. The process was the same as you described.
It worked flawlessly on a 3 hour flight with the PMDG 737-700. Impressive work.