Surely, you must be joking.
But seriously, you are saying, if I read you correctly, that the decision has already been made, and you need guidance to find out about how to go about it, and you DO NOT want this thread to be a discussion of the pros and cons.
Correct?
If so, then what is your role? Publisher? Distributor? DRM is not usually in the hands of the content creator or editors.
Has a decision been made on the exact form of DRM you need to implement? Social DRM, watermarking, ADE, etc?
ApK
p.s. Would you consider posting in that other thread to talk about how and why this decision was made?