To the OP, I just did an install with basically the same headers. Here's my 2¢:
Bill's guide is very helpful. I recommend following it closely. However, I found that driving up on ramps worked just as well as using jack stands at the drip points.
Use band clamps rather than the clamps the kit comes with. I got it to seal fine with the kit's clamps, but it just looked crummy. The band clamps look a lot nicer and will be more leak resistant.
Also, the SD kit comes with a straight pipe that might go in the place of a cat. Measures 11" long, so you'd need a cat smaller in length unless you want to cut out some of the "bend pipe" in the downpipe as well.
That's all I can think of atm. I left the egr alone because, imo, the benefits or removing it aren't worth the hassle when the headers are compatible with it.