Making a database with MySQL & PHP HELP!

Hello, I usually hang out and about in the VB .NET section of these forums, but I am doing some PHP and MySQL work. I thought of a great idea for my website, but don't really have a clue on how to add it!

I am trying to have a section on my website where users can upload screen shots of maps they are working on (for a Half-Life2 mod).

I want there to be a spot a user can make an account, they will need this account in order to upload screenshots.

Then once they have an account, they will need to login. Once logged in, they can add map names they are working on. Once the names they made are created, I still want them to be able to make more map names later on and/or edit the current map names. Also, once a name is created and saved to the database, it should display it under the maps section of the website (even if no screeen shots are uploaded yet).

Once the map names are made, I need them to be able to click on the names to enter that map name part. Once under that certain map name, they can upload screen shots through a browse button, I want them to be able to upload 10 screen shots at a time. Along with each screen shot they should have an option to write text about it, which will be displayed under that certain image the text goes with.

Once the map screen shots are uploaded. These too will be displayed under that map name under the maps section of the website.

So once this is all done and over, there will be a page called maps.php or somthing. This page will have all the names of the maps all the users are creating. The names will be links, so when clicked it will take them to that mapname.php page and on this page all the screen shots of the map will be displayed!

I know this seems like alot to do, but really I think I just explained it very detailed. Please if you can, help me set up my database to do this!

Thanks in advance :)