The HTHostToolv1.exe file you have requested: Tools and Utilities / Server Tools / Halo Trial Host Tool v1 - 104.62kb is not available. Perhaps try browsing all files for the game Halo: Combat Evolved and upload any files you want to share or are missing. This is the only information we could locate:
This lets you freeze players in your own server. It also has options like unlimited ammo and nades. It also lets you cancel flags and stuff.