How do you define different art board sizes for a custom Document Profile in Illustrator CS6 on Mac OSX?

How do you define different artboard sizes for a custom Document Profile in Illustrator CS6 on Mac OSX?

The default profiles all have options for different sized artboards. It should be easy to set this up and I can't figure it out.

I know how to make new document profiles and put them where they belong. Home > Library > Application Support > Adobe > Adobe Illustrator CS6 > en_US > New Document Profiles