actually you have the sunroof model. I just finished installing the same thing..fits perfect in my truck and I actually like it a little better (i'm going to do a panel of switches where the sunroof thing is. Might try my f-glass skills or maybe just use body filler.
Do a search for "sunroof" and it will show the person that did it. They kinda did a tutorial/pictures of how to cut your holes. I just made a template. Remember to cut less because you can always cut more. And when you drill your holes...whatch your roof. And I actually didn't use screws...I used my stock antenna to keep it up. I put it in my headliner...it works so much better because my "shakes" (from subs) kicked it down all the time.
08 Cummins Mega Cab, 7" on 37
02 Explorer Sport
08 Brute 750 on 29.5