If you install the Labview you got this year, there is a Dashboard utility that comes with it. You will, with some effort learning Labview and staring at the Block Diagram, be able to figure out how to convert the data stream.
At the
http://www.ifirobotics.com/dashboard_viewer.shtml Alan gave you, is a link to the "Dashboard Viewer 2005" - which is a ZIP file containing both the Dashboard program and PDF documents describing the byte-level protocol.