@dharrison: All this module does is create a new empty order. This module does not have anything to do with adding products to an order.

You may receive a faster answer by asking questions regarding editting an order in the Edit Orders support thread (the default page / module shown after the empty order is created). I believe you can add disabled products (not sure on attributes), but the best way to find out what can be done without modification of Edit Orders would be to try out your scenario in a "test" store.