HaloMods "Classic" Read-only Archive

I am having trouble whenever I go to load a map it says "Invalid Halo map file." I am using the ones right from my Halo CE folder. Anyone able to help?

HMT does not load HCE map files, only HPC map files.
You can open them however if you get a hex editor and open up then map. Use the search function and you can find a tutorial on it.

Or, if hex editing isn't your thing, use the handy converter program found here.

Or,if you want to be cool start modding HaloCE instead of HaloPC by watching this tutorials:
http://www.halomods.com/index.php?topic=Tutorials