Listing of defined fields in POI or Address book

Hello,

I suspect that these answers are probably already included in some other posts but I can't seem to find them. If someone would point me to existing posts I'd be happy to utilize them.

I notice that when I open the custom.gpx file that the address book listings appear to be nothing more than a separate category in the POI, is this correct?

If that is so I'd like to know which fields the Nuvi (255W) will recognize in a .csv file. For example it looks like column A in the .csv is reserved for latitude, column B is longitude (or vice versa), Column C is name, etc. but I'd like to find out what other information fields I can enter and in which columns they would need to be located. Can I enter notes, multiple telephone numbers, etc?

I'll probably end up trying to create a .csv from a subset of my outlooks contact file and importing it so I'd like to figure out the best way to do that.

From a file structure perspective can I just name my file Address_Book_my_address.csv to tell the nuvi these are address that should be placed under the Address Book Heading?

Thanks,
Ski

Ski