AppleScript Studio Button Images - Can you scale them to fit?

I’m building an application that will have a front end that has a iPhoto type portion to it. After some messing around I was able to build a matrix of buttons and load images into them but the images come in very small. I’m not sure what the code (or if there is any) that would let me scale the image proportionally to the size of the button.

Any help would be appreicated.