Short Sale Question

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I have an approved short sale property brought to me by a realtor. It had fallen out of escrow with the original buyer. I have investors that might be willing to buy the property. The question I have is how do I get control of the property in order to assign it to an investor? The broker should currently have control, so how do I get control and assign it and also have the realtor/broker make their commission as well? What paperwork would I need signed, would it be an option contract and who would it be made with? Is this deal even possible?