If you already have followed the required steps to make your manager's contacts visible in the Address Book, choose Tools | Address Book, then Tools | Options to display the dialog where yoiu can choose which address list to display as the default.

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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I have Outllook 2003, and I have opened my manager's contacts from
> File|Open|Other User's Folder. I have my own personal contacts, but I always
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> Im sure this is simple enough to set/code and has been asked before, but i
> couldnt find it. Any help? Thanks in Advance!