rear deck help

i pposted the same thread on the audio forum n no luck. Hopefully some one here can help me out.

ive hit a snag in installing the rear speakers in my 2004 coupe. i cant seem to figure out how to get the rear deck off. Any tips? any help is MUCH appreciated.

also, the holes in the doors to mount the front speakers are shaped funny. is there some sort of adapter i need? was an adapter supposed to come w/ the speakers b/c im not sure if i got one w/ my eclipse speakers (co-ax 6.5" se8363). if i did, i dont have the anymore. can i jsut mount the speakers straight on to the car door? thanks a lot in advance.