Menu Shortcut to Directoy

I may be misunderstanding, but it sounds like you want to create a virtual folder. To do so, right click where you want to add the folder, then select New -> Menu. Then click "Create Virtual Folder". In the Dialog that comes up, navigate to the root PLS directory (U:\-=[ Music ]=-\Internet Radio Stations), highlight it, and click "Ok". Then click "Create", and TLB will allow you to navigate this folder and all subfolders like a menu.

Is this what you had in mind?