Krup is the MAN when it comes to Head Unit Mods!
I got a t1808 and got a couple things that are NECESSARY, bro:
1) the aftermarket IPOD cable (comes 5 or 6 feet long, wont charge the phone unless you get the adapter that goes on the end of the cord. You can get both from a guy on Ebay, brand new...if you want the seller let me know!)
2) The Toyota HU has TWO (2) antenna cables...the Scion HU's have one. So if you go on Amazon, you can get both a 2-to-1 AND you'll need a jack adapter (as one of the male-leads is smaller than the other). Again, if you want this info, hit me up, i got you covered.