I just picked up a copy of Windows 7 Pro OEM for install on my computer. Guy at the store said the only real difference between OEM and standard retail box was tech support.
However, the outside of the box has this big warning that says "The software must be installed with an OPK"?
What is the OPK? Is it really necessary? The MS site about it seemed to say it was optional.
EDIT: BTW - I'm just an individual tinkerer, and not a System Builder Company Employee. I should have made that clear. I've used sysprep in a professional setting in the past, so I'm somewhat familiar with its concepts.