kirk, you're pretty much doing exactly what I'm doing. Here are a couple of photos from my instagram of the parts I pulled last weekend. The rear is HEAVY AS ALL GET OUT! so be ready.... keep the sway bar in place and use it to hold the gears while you let it down slowly. I pulled an extra tire from the junk heap next to the donor montero so the rear wouldn't fall so far.
For the front, undo the crown nuts that hold the steering onto the ball joins, also undo the outermost tie rod end. That will let you yank the axle from the front on drivers side. On the passenger side, you also need to undo a few bolts around the half-shaft (at least I think thats what its called) before you can pull the passenger side completely away. The rest (if I recall correctly) is just the 4 bolts on each side the hold the front to the mounts. (I pulled it from a junked car with engine and transfer case missing, so I had access from top and bottom. There might be a few more bits that need to come undone as well.. you'll spot them.
The rear, if you want to play nice... unbolt the speed sensor from each wheel, you may also need to undo a few of the places where the emergency brake cable is attached to the frame. There are 4 bolts on each axle flange. Undo those, and yank outwardly on brake rotor.. that should free up the diff. Unbolt all the way around the diff housing and use a dead blow hammer to free it up. The thing weighs near 100lbs, it probably won't just fall out, you'll need to work it out. I balanced it on the sway bar as I slowly let it drop onto the an old tire and wheel with some padding over it. (don't forget the sensor for the rear locker, and the airline for the rear locker.
go home and repeat the process. In theory, if you don't undo the gears and separate everything, they are adjusted properly and you can bolt in the new parts. Still makes me a little nervous, but I guess they've got 130k miles (give or take), they probably are still going to work just fine for many miles to come.
Photo of rear:
http://instagram.com/p/p2IgzFuZ4z
Photo of Front:
http://instagram.com/p/p13af7uZzt
be ready to get dirty (I was wearing gloves):
http://instagram.com/p/p2InWIOZ4-
you might want to give this thread a once over... someone else just did the same thing in the last couple of weeks.
This might be helpful:
http://www.expeditionportal.com/forum/threads/127096-Rear-carrier-removal-questions-99-montero
this is me:
http://www.expeditionportal.com/for...6-gears-from-an-LS-into-a-gen-2-5-with-locker