I tinted the windows on my old Audi. It was a pain to get it looking correct, but it's not SO bad. Be aware though, getting it just right is a four or five hour project if you haven't ever done it before.
http://windowtint.com/
Also window tint looks pimp, you will pick up a lot of hoes once get that sh*t tinted! The other thing you can do that is dual purpose is some fat 20 inch rims with spinners, the spinners help preserve forward momentum.
