If some one else give you their Address Book and you want to use it in your Address Book...,
If you use two computers..., here is a way of sharing the Address Book with both machines.

To Import addresses to your Address Book...,
From the Address Book Toolbar..., "click-on" File, then choose Import.

The Netscape Import address book file Dialog Box will appear...,

"Click-on" the Address Book File you want to import.
Make sure you are Importing an Address Book!

Netscape will include the Imported Addresses with the Existing Address Book.
Addresses with the "same names" are Added... not Replaced or Updated!