There are some really GREAT pieces of online documentation that show how to configure Outlook 2003 for specific scenarios. For example, how to configure Outlook 2003 for RPC over HTTP connectivity.
Integrating Outlook 2003 with Windows SharePoint Services
http://office.microsoft.com/en-us/assistance/HA011402701033.aspx
http://office.microsoft.com/en-us/assistance/HA011402701033.aspx
Installing Outlook 2003 after Office 2003
http://office.microsoft.com/en-us/assistance/HA011402721033.aspx
http://office.microsoft.com/en-us/assistance/HA011402721033.aspx
Configuring Outlook 2003 for RPC over HTTP
http://office.microsoft.com/en-us/assistance/HA011402731033
http://office.microsoft.com/en-us/assistance/HA011402731033
I’m not a big fan of the Office Product Group’s web site but these web pages are absolutely phenomenal as educational aids.
kurtsh
Kurt Shintaku's Blog 