OK I am still new to mining, and have not connected an antminer up to try this, but in GUI Miner You can actually start as many miners as you want with the same  piece of hardware, if you were able to set the antminer up in GUI Miner, you would just start a new miner and associate him a new worker name and password. I do this with my GPU hardware and all it does is cut the hashrate each time you make a new worker, if you add all their hashrates up it would equal the same amount as if there were only 1 worker active, meaning 1 worker only = hashrate 40 Mhash/s 2 workers = each one 20 Mhash/s 3 workers = each one 13.33 Mhash/s 4 workers = each one 10 Mhash/s and so on and so forth. So if you can have the GUI miner recognize the antminer, then just start a new miner and change /add  a new worker for each instance you start

We have purchased our first REAL mining machine and may purchase another really soon. I am still doing some tests on the equipment we just received. Thank you to all those who contacted me.