Take a look at the posted document for step by step instructions on Windows 7 Migration with SCCM SP2.  This document includes how to create an image using SCCM, Installing drivers, Installing Applications, Creating Hardlinks with the User State Migration Tool, and Renaming and Joining the domain.  This document allows IT technicians to create an Win 7 image, deploy it to their environment using collections, and upgrade their existing Windows XP clients to Windows 7 clients without having to remove the data and put the data back.  Included in this guide is some tips and hints on getting the image deployment to work for your company.