04 quad woofer boxs

I have a 04 Dodge quad and I'm looking for info on installing a pair of woofer boxs behind the rear seats. The rears seats are 60/40. there is no room under the seats. Any ideas.
Also thinking about a overhead DVD unit. How hard would in be to intall? I have a Sony unit in the truck now so I'll probly be looking for Sony DVD, all suggestion will be well used
thank you :confused:

yeah i got an idea do what i did put 4 10"s where the back seat used to be :D just took some pics should be on in the next day or 2.