cms or somthing else??????

hi I have a problem and I am unsure as to how to solve it.
I am setting up an art site with some other people and we want to be able to give each artist a page of thier own which they can use to upload photos of thier work anytime they want,obviously this would have to be password protected also however we do not know how to go about doing this we need something simple as we have realised our technical knowlage is less than we originaly thought.
We are getting pretty desperate know as we should have launched.
Here is a link to demonstrate what we want to do we just need someway of clients being able to acces thier stuff remotely.
mediamantra.co.uk/profile