just my 2cents...
dont put your spare in the back of the VX...unless you put it vertical along the side (similar to an older jeep)...there just simply isnt enough room

i was actually looking into building something like this because i wanted to be able to store my spare in the back and have some more cargo space...

although, after i layed the tire in there i realized that it would take up WAAAAAY too much space, unless you make a vertical mount

instead....build a false floor all the way across the back with storage right behind the seats. and a drawer underneath all of it, simliar to LDUB's....and buy some of that nifty rubber matting to put on top of the false floor...

now you have more space and cargo room...

thats actually one of my projects for this summer. i've been getting sick of my dog getting my VX all dirty, plus i can give the cargo box an angle so he has something to stand against when i brake hard