I didn't want to not have a spare tire so I decided to make mine in the corner of the trunk using this tutorial:
http://www.the12volt.com/installbay/...TID~74519~PN~1
I won't be making it all shiny or anything I'll just be covering mine with some sort of material. I also used foil tape rather than masking tape. This is the only picture I have but I'm done the process of shaping and now it's out of my car.
Saves a lot of room.