First off let me say that I am a beginner in this area. I've never tackled one and am in the process of researching in order to do this myself, as I've heard that regearing isn't really that hard. I was initially a bit intimidated by messing with the differential, however, I found this video today and just wanted to share it. After watching it, it seems MUCH less daunting and definitely do-able. Mostly just a little time consuming if you have to keep swapping side gear and pinion shims. Yes this is for a Toyota, but it's the same process no matter the brand (to an extent). Actually doing the re-gear is pretty easy, it's re-assembling and setting up the entire diff that's time consuming.
Anyways, less talking, more watching! It's definitely worth the 30mins of video!