invoke custom tool from creo menu

Hi all,

I need to invoke a custom application from the creo menu interface. So far i have set a menu placeholder for my application on the interface (see attached) using the "Customize screen" but i can only map those applications/commands which came with the tool (OOTB). Is there a way i can get my custom application to be on the list of commands that can be mapped back to the menu/flyout.

The custom application is a PERL TK based GUI.

Thanks

Kenan