I say to do this... Pull out the bezel that the HVAC and radio are in. Pull off the Airbag lightand HVAC controls. sand the bezel down so you can lay a single layer of matt over the entire thing. after you resin it and sand it smooth, take a dremle and cut out (from the back, so you can see factory openings) the openings for the HVAC controls, airbag light and vents. now flip it over and outline the unit you plan to use. cut that out with a side cutting wheel. that takes care of thr opening. now we put it back on the dash and get out our sharpie. Mark anything that is sticking out in teh way of the radio through the hole you just made.
we are going to make a mounting braket for the DD unit. this is going to take either a dremle or air cut off tool... cut the things you just marked with the sharpie. cut them back far enough for the unit to slide all the way back so that its flush with your bezle. hopefully the unit comes with a mounting cage. we will be plastic welding that cage into the spot you just made. some more trimming may be needed to get it in there. you want it snug so dont trim too much. now measure where you need this cage to be and plastic weld it in place. (jb weld will probably work.) makes sure that you weld it so the unit can still slide into place and lock into the cage. I suggest welding in the 4 corners if possible.

then the rest is simply wireing it up. I would get everything wired before doing the dash work. maybe its just me, but thats what I would do.

 

my weirdness aside... thats how I did the JVC double din indash dvd in an 03 stratus sxt... we flocked the bezel we I finished the 'glassing... looked awsome. black flock with the black interior... Wish I had a pic of it. we were just trying to get the car out...