I mainly do basic CSS and Flash design, so this is throwing me a bit for a loop (I'm still pretty new to all of this!).

I am doing a website for a friend who is a photographer. He already has a site but he doesn't like it and wants it completely redone and probably hosted elsewhere. The redesign is no problem, but he has a section where clients can login to view their proofs.

The current site is here: Session Proofing .

I am at a loss as to how to do something like this. Is it a complicated endeavor? I'm not even sure what I need to learn in order to do this. Do I need to learn PHP? Something else? Is there a resource I can go to that will help me learn how to create it?

I would greatly appreciate any help you all can give me. Thank you!