For starters, take a look at the script in this thread: Found Sets to PDF with unique file names
The trick will be in scheduling this to take place on the hour. The save as PDF script step is not server compatible so you can't set up a server schedule to run the script that saves your PDF. You can, however, set up a client session to save as PDF every hour.
Create a robot file that automatically performs the script in the server hosted database each time the file is opened. Set up an operating system based scheduler to open this script every hour. Make the last line of this file's script a step to close the file or to quit FileMaker.
Click a script that uses Install OnTimer to perform this script every 3600 seconds. You may need to open a separate window so that this timer does not interfere with other timers in your database.
Phil... I just want to export the layout. Im a little confused.
Please describe what you want in detail. Why do you want to "just export the layout"?