MS: How to switch from one installation type (Internet Mail Only or Corporate) to another in Outlook 2000

In Microsoft Outlook 2000, the Internet E-mail Information Service stores information that allows you to log on to your Internet Mail Server and by which initiates the log on process. Outlook provides this service during a typical setup scenario.
The Internet E-mail service is designed for those users who have installed Outlook with the Corporate or Workgroup (CW) setup option and also need to use other e-mail services, such as cc:Mail, or Exchange Server mail on the same computer. If you only use an Internet Service Provider's POP3 e-mail server and no other type of e-mail account then you should use Outlook with the Internet Mail Only (IMO) setup option.
To switch from CW to IMO on the Outlook Tools menu, click Options. Under the Mail Delivery tab, click the "Reconfigure Mail Support..." button.
More Info: http://support.microsoft.com/kb/195500/en-us