I don't have a site or anything for specific instructions but this is how I did it:

1. Bumper should be fully removed and ready to mount the intercooler. There are two hard lines in the front of the AC condensor that need to be moved. If you look into the front of the bumper, you should see what I am talking about. The front one needs to be moved behind the back one. Bolt them back in with them switching positions.
2. There is a hole that the top bracket of the intercooler fits into perfectly on the radiator support. Bolt the intercooler up to this hole.
3. Tighten the bolt and let the intercooler hang.
4. Connect all the charge piping and tighten the hose clamps.
5. When the time comes to put the bumper back on, do so like normal. The drivers side of the splash guard needs to be cut to accomodate the charge piping. Cut it and then mount it. Take the other two bolts Greddy supplies for mounting the intercooler and secure the splashguard with them. They bolt into the bottom two brackets of the intercooler. This will keep the splashguard from hanging and it will secure the intercooler completely.

I wouldn't recommend mounting the intercooler until you have the kit to install because you will have to remove the bumper twice, which sucks ass, if that is why you are asking.