Tools | Address Book, then Tools | Options will let you set the default list
shown in the address book.
You can locate contacts folders in the Folder List navigation pane.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Upon upgrade to Office 2003 I now have a contact file full of data from my
> old version. But, when addressing an email To: the system is going to an
> empty contact folder somewhere I cannot find. How do I tell the email
> compose function which contact folder to go to? How do I find and delete
> the
> empty (apparently the default) contact folder?