Automate mailbox homing to shared mailbox

Hi

We have a team of 20-30 people with no email accounts that share a single mailbox. Office 2003 installation is automated via GPO and Outlook has been configured to automatically home and configure users mailbox when it's launched first time. Without creating separate installations and profiles, is there a way we can get Outlook to automatically home to the shared mailbox? Are there any particular AD attributes that need to be configured?

Any suggestions would be appreciated.