With the release of 10.4.6 and iSync 2.2 their is support for syncing contacts on a Motorola Razr V3c but not iCal.
Here is a link to a fix to allow you at your own risk to enable iCal syncing, it worked for me, but it doesn't support all day events.
http://www.briantoth.com/razr_v3c/editmeta.php
Modifications to your iSync application are done at your own risk. Back up iSync before messing with it. one note where he says change to yes it should be change false to true.
iMac G5 20" 2 Ghz Mac OS X (10.4.6) Verizon Razr V3c