Setting up Exchange 2003 with Apple Mail software

Is there a guide somewhere or anything like that? I need it well explained, because I get all the server addresses and all that mixed up, and I never know which one to put in. I also don't understand many of the abbreviations. Right now, my friend set up the exchange email in my entourage, and my gmail in the apple Mail place. I would love to have both of them in mail if possible and he is out of town right now.

Thanks!