I am currently running a single-user Quickbooks Premier 2007 Accountants Edition on my office network. I would like to add another license, so that two users can concurrently access company files. I am thinking that I will simply purchase another retail copy of the same software to accomplish my objective. Will this work? If so, do I need to purchase the exact same edition? What would happen if I purchased QB Pro 2007, or QB Premier Retail (or whatever) 2007? Could I still access my company files (there will be several files) with the various different versions? What are the repercussions of operating in this manner?