POI Category assignment - How To?

How do I assign POI's to the built-in categories?

For instance...I create a POI for a local winery. I woul like it to display only when the "wineries" option is the "Map Setup/Display/wineries" option is checked to display?

Can addtional categories be added to the "Map Setup/Display" list such as "Grocery Stores"?

Is there a default Magellan file that might need editing?

I am working with VantagePointe and an old explorist at the moment.

So far all I can figure out is to use multiple custom POI files without any categorization...all POI's are on or off by file selection. No categorization.

What am I missing?
THANKS! SSBN610