Getting the whole lot out isn't nearly as hard as trying to get the transfer off the box with it in the car
Unless you have access to a hoist and a gearbox stand I would recommend paying someone to do it.
Should you choose to accept this mission, keep these points in mind (based on my experience with a V6):
-The top bell housing bolts are a bastard to get to without 100cm of socket extensions and a gooseneck or two.
-The earth cable between the firewall and one of the bellhousing bolts is the perfect length to get caught up in between the flywheel and the bellhousing when you are putting the box back in.
-Your handbrake light wire will probably get squished by the gear lever boot surround when you are putting it back on, causing the light to stay on all the time.
-The exhaust bolts on the join just in front of the cat converter will probably require heat or at least lots of penetrant to get them moving.
-Beware of aftermarket so called heavy duty clutches. Not sure what brand mine was but it has only done about 30k km's and is just about knackered.