Hi Mac, The best solution is to use one of the Micro keyers. You only need one USB port. http://www.microham.com/index1.html Good luck, Theo ON4ATW. E-mailbericht gecontroleerd door Spyware Doctor (6.0.0.386) Databaseversie: 5.11220 http://www.pctools.com/nl/spyware-doctor-antivirus/