The FREE plug-in set was designed to work with pre-iSync 2.2 releases, and while V3x support was claimed, Nova Media stated that it had not been tested. I will send you a copy if you want, but I don't expect that it will work with your handset and iSync 2. If you want a copy, send a message to the address in my public profile and I will reply to it. [There is no address in your profile.]
Mac OS X 10.4.7—coming relatively soon—is expected to extend handset support, but there is no way to know at this point if the Motorola RAZR V3x will be included.