An interesting step by step guide !  With it,

you can deploy the 2007 Microsoft Office system and other software products at the same time to all users. You first install a custom configuration of Office on a clean test computer. Then you capture and distribute an image of the hard disk to users' computers. The first step in this process is to configure Office in preparation for the hard-disk image.

The following is here : http://technet2.microsoft.com/Office/en-us/library... 

Microsoft TechNet