Subwoofer Idea

I was given 2 12" subs from a friend and I was wondering how to take out the under-seat storage under the back seats in my Access Cab so i could fit one on each side. I tried unscrewing the screws but thew would not budge. How can i take this piece out?

 

There not really screws... more like plastic rivets. Take a flat head screw driver or any other flat metal tool and pry up on the screw part as you loosen it and they will come out.

 

I cant imagine some 12's fitting under the back 'jump' seats. If you get it to work, let us know how you did it. I want to put 1 12" in my truck but was just going to build a box and sacrifice 1 seat space. Dont want to give this up, but dont know if there are any other ways.