Step 1: What you'll need
iPod touch/iPhone clip.
(I purchased this in the mall at one of those booths that sell cellphone accessories.) Cost $11. This was my main purchase.
Thin, pliable piece of metal. I took mine off the back of an old hard drive.
Two nuts and bolts
Two self taping screws
Thin foam (optional)
Oh, and a car. Preferably one of the ones mentioned previously.
Step 2: The beginning
To pull out the vents, use a screwdriver and pry them gently from the center out. They should come out rather easy. Use torx screws left and right side. Pull out entire unit, may require a little force. Don't pull it out too far, wires will still be connected.
I pried off this metal backing from an old hard drive. You can purchase a piece at a hardware store.
After prying it off, I figured where it would need to be bent in order to attach it to under the dash, between the vents.
Bend the plate in a vise, and flatten out an defects. (I also had to goo gone the stickers).
After figuring the placement, I primed, painted, and put a little semi-gloss on the plate
Step 3: Attaching the iPod clip
After finding nuts that are not too long, drill holes in both the clip and mount and attached them with the screws.