There are three web sites you'll want to take a look at. They will pretty much provide you with the information you're looking for.

The one thing that screamed at at me... It Ain't Easy!


How to Tint Windows
http://www.tinting.com/

Window Tinting Laws:
http://www.tintcenter.com/laws/

Basic Info on the "Art" of Window Tinting

http://www.tintdude.com/

Good Luck!

Pete