Help with Forms, and PHP scripting

Ok, i need help creating a get form to populate a field once the user enters their ID number. I need the submit button to populate the defined fields.

Second, I need help modifying a picture of the day php script to correctly grab the content i want it to grab.

I hate websites...

Please hit the contact button and email me, so I can give you the direct URLs and you can see what im trying to do- it will make much more sense if you can visually see it!