Where can I store the spare tire?

[NotEnough]

Got a question for you Treeboy (or anybody else who might know).

I've got an order in for a new 35d. No production date yet, so I'm thinking of adding the spare. I would probably leave it out normally (ie driving around town) and only put it in on a road trip where you might be a ways away from a dealer or suitable replacement tire. At $300+ for the spare wheel kit (plus mounting/balancing), it's probably cheaper to spec the truck with the spare ($150) and then source the black carpet. What else comes out after you installed the spare kit?