You can use the disks from the Kit of Parts to load LabVIEW for FRC on your own computer. Then download and install the LabVIEW update (see
http://www.usfirst.org/frccontrolsystem for the link).
The HolonomicDrive vi is in the RobotDrive palette of the WPI Robotics Library functions. Once placed on the block diagram, it can be changed from Polar to Cartesian input.