If you have an immediate requirement to demonstrate Dynamics CRM 4.0 then please follow these instructions: We will use the RC0 VPC and remove this pre-release code, then install RTM 1) Download the RC0 VPC from here: http://blogs.msdn.com/ukmscrm/archive/2007/11/19/dynamics-crm-v-4-0-rc0-available-on-partner-source.aspx