sell the sub and get a 15 as you won't fit that sub in the proper sized enclosure in your trunk.
But if your set on using it then 6cubes net, 96^2 port area, and tune 35-38Hz and I'd assume you'll have to do the sub upfiring and build the box in the trunk....
you could go on the team north east spl forum and see if any members in the area could give you a hand,id help you out but im 40 miles west of rochester