I dont know how to do it.
okay, well the simple way to just copy all your fs9 guages into the fsx guges folder and do the same for sound, effects.
Then just find the ffx 733 in fs9 aircraft folder and copy it over to FSX/simobjects/airplanes.
If you want you can also just copy the defualt 738 (just copy, if you know how to alias it do that to save space) into the 733ffx folder , do same for the aircrafts sound.
Hope that helps
James