How do I set numbers.app '09, to default process all files in Excel format. At the moment, I always read Excel files, work on them and have to "command+shift+s" for saving + a seperate tick in the "save a copy as xls" field. This drives me nuts. Normally, I just work on a file, "cmd+s" to save my work and "cmd+w" or "cmd+q" to close the Window/ program. The same applies to pages.app, which I would prefer as my standard text writer. Unfortunately all my customers/ coworkers work on Windows with Office 2003/ 2007 and expect these formats.