Fran,
It looks like you may just need to change the Image Sizing property to Stretch Image. This can be done by clicking on the Picture box object that you created and then clicking >. Setting the picture box to Stretch Image will cause the image to grow or shrink to fit within the picture box you created.
-Michael
Michael Melo
Product Manager
Method Integration Inc.
Website: http://www.method.me
LinkedIn: http://www.linkedin.com/in/MichaelMelo