Problem solved ^
Remove the rearview mirror. Replace it with a 7" screen, leave your stock deck alone. Drill through the lock in the trunk and insert a camera in the whole, wire it to the screen, and viola, you have a rear-view camera in place of the mirror. Next, you can use either a lap top or an xbox and hook it into the screen.
My friend did this exact project on his 1993 Rx-7 TT. It's awesome. I dont know what problems you'll run into concerning the alarm and the trunk lock, but thats for you to find out. He has his lap top hooked up the screen, and we cruise around neighborhoods looking for wireless connections, when you find one you can browse the internet....99% percent of people dont protect their wireless connections!