HaloMods "Classic" Read-only Archive

ok, i know this is a nooby question and i am not a n00b modder but i dunno how to do this.

how exactly is it done? thanks for the help.

I'm sure you could have easily found this if you searched just the slightest bit....but since it's easy....in dothalo under the HLMT find MC and change Invulnerable to yes