There's not really much to using an xBox game controller in FRC LabVIEW.
If you want comments on using the particular vi that you've downloaded, then you'll need to post it or a link to it for advice.
The xbox controller connects to a USB port, then shows up as any other joystick in your robot's LabVIEW code.
Controls translate to this:
The robot code looks like this:
Expand the axis and buttons to see more of each that are available from the xbox controller.