I'd only ever done fwd cars before i got mine but i just got stuck in. After all its only an engine, theres just more to remove with all the 4x4 running gear thats all.
If your a competant mechanic then you should be ok
If you've got access to a ramp then that makes life easier, but if not the way i do it is to get the front of the car as high as possible on axle stands then drop the engine out onto the floor and separate the engine and box underneath the car
The first time you do it will probably take a bit of time cos theres brackets everywhere that need to taken off to remove the box :evil:
Good luck