I have recently deployed Configuration Manager 2007 R3 beta (refresh) in production at my TAP customer. Below I will outline the steps for deploying Configuration Manager 2007 R3 beta. Disclaimer: You are not allowed to install any beta products in your production environment!!! This is only allowed for selected TAP Customers !!! Always install beta products in lab environments !!! This blog post highlights R3 the beta upgrade preparation on your SCCM 2007 SP2 environment . You need SP2 in order...(read more)

Read the complete post at http://scug.be/blogs/sccm/archive/2010/05/14/sccm-2007-r3-beta-refresh-installation-howto.aspx