Xbox live traffic
first of all you did a great job with pfsense.
i have a small wish for the traffic shaper.
can you add xbox live to the gaming part ?
the most information what you need you find here
While this funcionality isn't included in the wizard, you should be able to easily clone them from the existing rules created by the wizard. Just make sure you change it UDP/TCP and the port it mentions and it should work fine.
Pick Halo2 in the wizard. It uses the same ports. Meanwhile I commited a "Xbox 360" option which is identical to Halo 2 but added it for completeness.