Regardless of your reasons for removing an Exchange Virtual Server, you must consider the requirements discussed in Removing an Exchange Virtual Server.
Before you start managing your Exchange cluster, you may want to review what constitutes an Exchange Virtual Server and its associated Exchange resources. You may also want to become more familiar with Cluster Administrator—the primary tool used to configure and manage clusters.
Also, make sure that you are familiar with "Using Server Clustering" in Planning an Exchange Server 2003 Messaging System and with "Deploying Exchange 2003 in a Cluster" in the Exchange Server 2003 Deployment Guide.