Water pump Help

I have a question on a 1996 Caddy Sedan De Ville, I think it has a 490 motor, its not my car, I looking for some secret to replacing the water pump belt and replacing the altenater. Any help would be great, its my brother in laws car and he just figure it out.
Thanks
Joe

Should be 4.6 Nothstar, check the under hood label, you really need to know what you are working on first.

Its my brother-in-laws car, he ask me to ask the question on here.