Thx drz... it actually was a hell of a lot easier than I thought it would be. Originally I was thinking I'd have to cut the metal and re-shape the hole to mount it - when all I had to do was cut away some of the foam on either side until it was snug and then just pop it in.
Now I have to find where I'm getting the fuel smell from both in the trunk and rear-drivers side. I'm thinking it's my expansion tank (the fuel lines on it are all white & fuzzy... deff. not normal) - I only get it after I fill the tank, and until I have just under a half tank left... whatever it is, I don't want to put in all my amps and speakers just to have gas fumes ignite inside my trunk and destroy the car.