iPhone photo file name. Can you change them to the date?

Maybe this isn't possible. But I would really like to know if there is any way to change the way the iphone files the pictures that you take with the camera.
For example when you take a picture its stored in the iphone as "IMG_001". I really need to make it so its the date and time for example "08-18-08_1424".
Let me know I really appreciate it