conversion

I know there is a way to convert to disk brakes in the rear by swapping over parts for the early path finders. However this seems to be a lot of work, especially if you don't have the specialized pullers for the bearings, and parts to where you would be getting to the cost of swapping in a more...

I have a 2000 Xterra that is 2wd, but want to make it 4wd. I know of an xterra at a junk yard that is being parted out so I could get 4wd off of it. Does anyone know how hard the process is? Or is there a thread on how to do it?