Migration Strategy FSX --> P3D V2

I saw a thread in the French language AVSIM Thread on this topic. I thought this is something I need to starting thinking of.. What is the most painless way to lverage your FSX Installs when we install the new P3D V2 in the same PC.

http://forum.avsim.net/topic/426800-migration-fsx-vers-p3d-v2/#entry2857475

http://www.flightsim.ee/products/migration-tool

The challenge is in our addon scenery. The most arduous and time consuming unlike addon aircraft which I personally don't mind re-installing.

I am thinking of doing this.

1) Mega scenery - Simply cut paste the scenery.cfg entries over and thats it.

2) FSDT airports, reinstall.

3) Fly Tampa - scenery.cfg entry? would this work or do we need to reinstall?

4) Orbx - This is going to be a challenge. Is there a way to avoid reinstallng two versions of them? I know I would have no choice to reinstall the PNW and other zones...but for individual airports, I can simply add an entry in scenery.cfg for the P3D V2. Yes I may lose the people animation..but that is not tonally required..I can live without animation of people... Anyone got better ideas?

5) Aircraft - What if there is no new install programs (and its ok as per EULA),..how do we migrate these over? Let say CS 727. How do I know what the gauges are there that belongs to 727 that I need to copy over.?