Starkeeper,
  Thanks for the info.. I understand what you mean about XG works and my 550.. My problem is that my wife and I only have one computer in the house.  When I want to use XG works I have to drag my keyboard over to the computer and hook everything up each time.  I like the softsynth idea because this way I can by a very inexpensive midi controller, and keep it at the computer.
Squeak
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GEAR:  Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller).  SOFTWARE:  Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.