The fuel pump rewire requires you to open your trunk, unbolt a couple of bolts and plug it into the fuel pump, find a nice ground and then run it to the front of the car to the fuse box.
I'm not sure on Intense's IC need for LIM porting. But regardless, all that happens is you knock a section out of the LIM like andrew said, not too extravagant but it is better off you do it and get done with it.
You can get a I/C pump relay from W-body store I believe for wiring.
It is best to find someone local to help you, or to buy a full kit with directions, but since you already have the stuff, it will take a little patience to learn how to do it right and a lot of good judgement on who you listen to on here.
