If the .oft file extension isn't recognized, try running Help | Detect and Repair in Outlook and choose to reset shortcuts.
As I said, in addition to running the .oft file itself, you can invoke it through the Tools | Forms | Choose Form dialog. Browse to Templates in File System.
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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers