Hey Everyone! Sorry if i am not posting in the right area. I have a 1997 Cadillac Seville STS W/Bose. I would like to remove the factory head unit and all speakers. I have attempted to do some research as to how to accomplish this feat. I have came to the possible conclusion that i cannot just rip the old stuff out and replace it without purchasing a bypass of some sort. With simple cars i have no issue replacing head units and speakers, but when it comes to this Bose stuff i am completely clueless.

1: How do i remove the Bose head unit?
2: What do i need to install an aftermarket unit and speakers?
3: Will the CD player in the trunk still work?
4: Is it possible to put in a double din?
5: Any recommended speakers and/or head units?

Please be detailed as i am still new to the world of Cadillac! Thank you very much!