XML Slideshow define image size

Hi All,

I am tweaking this great tutorial on the site
http://www.kirupa.com/developer/mx2004/xml_slideshow.htm

However my images are being displayed at a smaller size than their actual image size (150px x 150px) is there a way to ensure that the images display at this size defining it in the AS or XML file? If so can I get a quick example?

Thanks for reading!
Paul.