If you are replacing the unit with another double DIN unit, all you will need is the wiring harness adapter. If not, you will need a kit from Metra.
Nothing special about the dash, it is held in place with spring clips. The radio is held in by 4 screws.
Tip: If you need a harness adapter, the Hyundai one will work. You can find this at the AutoZone, Pep Boys or Kragen auto. You will not find a Kia adapter unless you go to a large installer like Audio Bahn or Circuit City.