Hey, Thanks for the reply. I've got BDD up and running but I'm fighting with unattend.xml and the jacked up interface of windows image manager. The question I have is directly related to adding a NEW OS. I have added my capture, with the Custom image file option, but I want to know what to know what are Specify operating system setup files used for? Can I add an autounattend.xml here or predefine my unattend.xml, what? Thanks,