Help Sizing loaded jpgs

Hi, I’ve tried searching the site for a tutorial on resizing JPGs within clips and having trouble accomplishing/finding what I want.

Say I want all my JPGs to fit in a movieclip at 320x240, but the JPGs come in at different sizes, but the same proportion. I’m having trouble telling flash to keep them all the same size. I’ve been playing with getBounds() to capture the size of imported images, but having trouble making it work to resize and fit the jpgs properly in the clip. Could someone offer any links or sample code? thanks–