I have installed Mapsource under CrossOver Mac 6.0 Beta 2 in a new bottle and the application runs but the menus are blank as in Beta 1. It seems all text (menus, the about box, popups, etc) are missing. I have installed Mapsource 5.4 that came with a Garmin 276c and is described as 'Trip & Waypoint Manager v2'.
The 'Trip and Waypoint Manager v2' install procedure invokes installation of Mapsource, then the Trip & Waypoint Manager- in other words its not just one 'setup.exe' execution. The installation runs successfully in a 'win98' bottle but fails in a 'win2000' and 'winxp' bottle.