XCARLINK How hard is it to fit one of these Gizmo's? Into an Audi A3 99 plate. Currently have just a tape deck standard HU but want to use my ipod without using the dreaded cassete adapter with the fiddly temperamental wire. Is there drilling involved? Could a noob fit this? Any FAQ's or instructions available? Cheers people. Ps. I only need to use ipod no need for any phone/blue tooth etc so it XCARLINK the cheapest bet?