OK, so I've been on a kick the last week or so. I just posted an update which fixes a few bugs and errors in the previous files. It also contains a data file for Monster Hunters 4 - all 10 of the Sidekick templates, all 5 of the Champion Upgrades, and the two Low-End Allies to boot.
http://gurpsland.no-ip.org/GCA4/MonsterHunters.zip