Image group in Windows Deploymenthttp://msmvps.com/blogs/richardwu/archive/2009/07/01/image-group-in-windows-deployment.aspxAn image group is a collection of .wim files that share common file resources and security. Servicing an image within an image group (such as applying a hotfix or a service pack or updating files) requires exclusive access to the entire image group. FileenCommunityServer 2008.5 SP2 (Build: 40407.4157)