The only way Outlook can do that is if you create journal entries to all the linked items into a single public journal folder. This is not an easy task; see http://www.slipstick.com/journal/pubjournal.htm
You might want to look into using a customer relation management tool that's compatible with Outlook. See http://www.slipstick.com/addins/contact_management.htm

Signature
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
> How do I link files and items to a contact and to have this public on all
> computers.
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>
> Thank you.