Haha, Thanks for the reply. I don't think that would work to well, I
should of explained this better. Basically what I do is send a
proposal to a customer and I want that proposal protected. I send
probably 50 a year to people I really don't know, and that I don't
want them to have to do anything other than open the document. They
should know that it is protected, but once (if) it leave there
computer then it wont open.

Make any sense?

It seems like it is possible, once the document is opened it ties with
that computers address and only opens for that computer. That way if
he forwards it the receiver will not be able to open it. Seems
possible to me but I really don't know too much about whats out there.