How to collection of resources to prepare a windows for imaging:

http://www.youtube.com/watch?v=PNWo-WjxChw

http://www.youtube.com/watch?v=50rxYNni548

Sysprep:

located under c:\windows\system32\sysprep  directory

run sysprep.exe

select : enter system out-of-band experience

click: generalize

select: shutdown