A simple script hack from Macworld that you can do yourself in less than a minute. "Is there a way to have QuickTime 7 play in full screen without paying for the pro version? Sure. Launch Script Editor and enter this..." This works great on my Macbook Pro.
read
more | digg story \<http://digg.com/apple/OS_X_Full-[Screen_Quicktime_for_free]()-[no_QT_Pro_upgrade_needed]{#no_qt_pro_upgrade_needed}.\>__