I ran across this a few days ago and decided to try it. Took me 20 min and the only tools I used were: a screwdriver with some hex bits, a punch/hammer, a dremmel with a sanding drum and some locktite.
Doing this took ALL of the creep out of a stock dpms trigger and reduced the trigger pull by about 2 lbs. (Started at 8 and was just a hair under 6 when I was done) I was so amazed at how well it worked I had to share it with you guys.
Heres the link for the how to:
http://www.junkyardgenius.com/firearms/ar-15/ar08.html