Hey...getting to this late. Hopefully you didn't buy the euro motorspeed kit. This is what I bought:
Double Din kit Pioneer ADT-133 = $40 (off ebay)
Installation Kit (Ant Adapter, Metra 70-1787, radio keys) = $26.81 (amazon)
AC Bezel = $12 (Suncoast)
ABS Sheet = $10
Insulation Foil = $5
Porsche sticker = $10(?) (off ebay)
As you can see, under $100, you can get a kit that is the same as the $250 kit. Labor is free
I can send you the instructions if you need.