Its not hard, just be methodical and keep track of where each bolt goes
this is how I do it with what tools to use
1- jack up ass end of car and remove wheels
2- remove the split pin from the hub nuts and then the hub nuts themselves (32mm socket) also remove the brake caliper from the hub so when you swing the hub away to get the axle out you don't pull on the brake line (2 x 14mm bolts on the back of the caliper)
3- remove the AYC lines from the back of the diff and drain the oils, (14mm or 12mm line spanner for the ayc lines and 24mm socket for the oil drain. ** the oil from the AYC resovoir may come out of the lines so have a container ready to catch it**
4- remove the 4 12mm nuts and bolts holding the driveshaft universal joint onto the diff front flange (2 x 12mm spanners)
5- Undo the 17mm bolt and nut on the very top of the hub carrier, the one that goes to the upper wishbone arm. also undo the two 17mm bolts & nuts on the bottom of the hub (17mm socket w' breaker bar and 17mm spanner) **leave the ball joint from the square arm attached as its a bastard to pop out of the hub and then even more of a prick to get back in as you have to load up the taper to stop the joint just spinning around when trying to tighten it back up again later**
6- now the hub is loose it will piviot out around that ball joint which you have left attached, this will let you (with a bit of jimmying around) get the axle out of the hub. If the axle sticks in the hub from rust or similar put the hub nut on but backwards so you have a nice large surface to smack with a hammer (so you don't f*ck the threads on the axles if you plan to reuse them and hit them with a soft faced hammer.
7- get a pry bar and pop the axle out of the diff
8- repeat steps 5-7 for the other side of the car
9- now the axles, oils, AYC lines and drive shaft are disconnected there are 6 17mm bolts at the front of the diff which need to be undone, the top one on the passenger side of the car can be a right bastard as it fouls on the fuel tank sheild so I usually crack that one first and wind it out until it hits the sheild, and then undo the rest and come back to it last once the diff has sagged A bit.
10- get a big 22mm spanner and undo the two bolts that go through the back of the subframe into the back of the diff, this are quite difficult to get to because of the sway bar in the way, and depending what kind of exhaust you have depends on the kind of obstruction here too.
11- Ta-Da!! your diff it out.. try not to drop it on your face, that hurts!
and you are going to hate me for this but installation is reverse of removal!, if you get an open diff I'd pull out all of the ayc pump and resovior and the AYC fuses as its no use anymore, and the open diffs are much easier to put back in as they are lighter, less bulky and dont require 2 types of oil and don't need to be bled.
any more Questions feel free to give me a buzz on the phone if you still have my number, Ive replaced a few diffs over the years