I am going to try and tackle my rearend seal this weekend if possible. I have done some studying on it and asking around, and have come to the conclusion that I can do this. I will try and follow Toreador4x4's how-to as well.
I also ran across this video which is extremely helpful! Its a mechanic showing a video on how to replace the pinion seal. Now granted its on a Ford Crown Vic, but the process is still the same (i dont know what rearend the crown vic has).