has anyone replaced their bose speaker set up? if so i have a few questions

do u have to remove the door panels to install the front speakers?

do u have to run new speaker wire to the head unit?

i have a pionner head unit but there is a special wiring harness for the bose, if i am swapping out the bose can i still keep this harness or do i need a differ one?

what size are the front and back speakers?

and if u change the speakers will the one in the trunk no longer work, i mean can u still run 5 speakers?

and where are the bose amps located on the speakers themselver? thanx