I just got mine ordered off eBay too and i'm having difficulties.  I was able to get and correctly install the right drivers, but still haven't gotten it to work. I see the command line going around has helped a lot of people...  I hate to ask a total n00b question here, but how and where do I go about entering that command information in CGminer?  I'm not too families with theses things yet, but I've been learning a ton lately and have been controlling my other usb miner with BFGminer on Slush.  Any help greatly appreciated here.