Here you can find info about the mods, and a download link.  All the mods are in PPF format only, but they're all made "Halo friendly" with KHT.  To install the mods simply open them with KHT and press 'Apply'.

Mods
    Rocket+Tank2
    Matrix

Mini-Mods
    Ghost
    Hellfire
    No Flags
    No Shees
    One Hit Kills
    Zoom
    Unlimited Ammo