interior speakers

i have a 1998 grand prix gt, and i need/want to replace all the speakers, i know there is quite a bit of them. I need to knwo what sizes to get and how many? can you guys help me?

what sizes are there in the car?
and what size goes where?

Door is 5 1/4, rear deck is 6 1/2 & 6x9 or atleast in mine.Not sure about the Bose's system.


~Larry~

Thanks Big L