They have one driver for all CAD programs. That's the way I take it when they don't offer you different versions of the driver for different versions of SW. If the latest driver doens't work your going to have to email 3dconnexion, since they make the spacebell.
Yes, the latest version of 3Dconnexion Software (v1.2 - released 10th Aug 2004) contains 3Dxware and the solidworks add-ins all in the one installer. For more information: