PAM Builder

I can't figure out how to apply the themes I make using PAM Builder to the PortableApps drive menu. It appears to me that you cannot apply themes other than the ones listed in the "options" tab. This is very frustrating because this app looks very promising once I know how to use it. Now I do like some of the themes the drive menu comes with, however there is a limited amount and I would really like to personalize my drive menu (like you can personalize Windows) but I can't find a way to apply the themes I make. Am I the only one who is frustrated with this
or have other people had this problem as well? PLEASE HELP ME!!