Ok where do I find cnm cuz I looked on google and on yahoo and I can't find one site with the files for it.

???
There is no needed files, "crash and massacre" use a Q2dm map with added monsters direclty downloaded from worldserver when playing.
For trying this mission, go and beat the mine entrance map (classic Q2 mission 4), take attention to message at the end of the map, you will be informed about what to do.

thanx I'll try to get that far.So far I got up to level 5 then got my ass kicked