'05 Accord Hybrid Speakers + cd Deck help!?!

I have recently purchased a Honda Accord Hybrid 2005 in Canada. I am looking to install new speakers and a cd deck. I had 2 questions;
1. What size speakers are standard in my car? how many speakers?
2. since my car has the auto climate control on the dash, how do you change the cd deck without losing that feature? is there a way?
Thanks!
Scoffman