Image Hosting website adult modifications

I'm currently using a script from [login to view URL] I need a few modifications to the code, so only bid if your comfortable with mysql, php and html. Modifications I require: When signing up a user is required to enter data of birth, which will be displayed on the profile page. When a user uploads a photo, they have the choice to indicate if it is an adult photo. Adult photo's can only be viewed by a user who is 18 or over - checked by the users date of birth in profile. Adult photo's can't be viewed by a guest. Adult photo's cannot be seen on the main page. Have a tick box to either include or not include adult photos with search. [login to view URL] is my website.