Outlook uses Contacts Folders, not an address book.
You can group your contacts several ways:
1. Distribution Lists
2. Categories
3. Separate Contact subfolders.

Signature
Russ Valentine
[MVP-Outlook]
>I supposed to grouping my personal contacts which were saving in the
> addressbook of outlook 2003. But I don't know how to do that. Anybody can
> help me?