Custom Pins, Custom Buttons, Design Your Own Personalized Pinback Button Badges

If you buy the pack of 5 buttons, can you pick 5 separate photos to go on them? Or is that not allowed?

If i place an oreder of 100 how long will it take for me to receive them?

How do you change the background color on the button?

If I send you the photo for the pin but to center it, the edge of the photo might not fully fit the circle will you fill it in?