I have not been able to figure out how to map PageDown to Option. I have KeyRemap4MacBook installed, but the options they have in the "Change Key" pane don't allow me to do this.
How can I map PageDown to Option?
Try saving something like this as private.xml:
I'm not sure, but it might not work if you don't have another keyboard with an option key connected.
The test folder has an XML file with all the predefined remappings.