sorry to hear about your problems.
theres a load of info and pics on this in my build thread, maybe 10-15 pages back.
it is possible to fit the bearing using a length of scaffold tube to knock it on, a bit like a giant slide hammer.
but i didnt want to risk damaging the bearing doing it in this way, especially as i know what a bastard it is to get the bearings off the shaft.
so the easy bit........................
1. jack up the side your going to change the bearing in, and remove wheel. (idealy if your not changing the diff oil, jack this side of the axle so its higher than the other side, to stop the oil running out).
2. remove brake drum and disconnect handbrake cable.
3. remove the 4 bolts that fix the half shaft to the axle, these are behind the brakes near where the shocks mount.
4. now pull the brake backing plate, and the shaft should pop straight out.
doing it this way means you dont need to mess around dismantling the brake shoes, and so is quicker and easier.
everything above is the easy bit and should take no loner than an hour at most.
cutting the old bearing, and locking ring off the shaft with an angle grinder, is the tricky time consuming bit.
once thats done, id take the shaft to a local friendly garage and give them some cash to press the new bearing on. the place i went to only charged me £5 and it took about 10mins.
make sure you replace the seals at the same time. if you get a complete wheel bearing kit from some one like milners, it will come with all the seals and the O ring that you need.
http://www.milneroffroad.com/toyota-uk/ ... kit-1-side