How do I play exported Quicktime Movies in Full Screen mode?
You can use a simple Applescript to solve this problem. Truly, Quicktime is the best choice if you have to present on a PC. This format preserves all of the effects that make Keynote so great. Go to the Quicktime Applescript page here to download the files. The set of scripts includes a “Save as Presentation File” droplet that will set the playback properties so that a movie file will self-present and close or quit when completed. Be careful if you use the scaling options, as that will degrade the quality of your graphics.