It's pretty simple to do it. Gotta get the brackets along with the caliper. A lotta people use the Gen II dust shields. I could never find them so I trimmed mine to the match the caliper with a air cut-off tool. I used the 3.0 calipers and the matching rotors on both of mine. You have to use shorter bolts then the stock Gen I's for mounting the hubs to the Gen II rotors.
The first time I kept the Gen I's rotors and turned them. I cam home hauling my wood trailer and the first time I hit the brakes, warped the rotors. After that, went the Gen II's. I like the stopping power. No more white knuckle stopping with the trailer fully loaded (which is always WAY too much <img src="/forums/images/graemlins/lol.gif" alt="" />).