An update for thosegetting an error when loading the mod, if someone is stillinterested:
If you want to load this mod on some of the newer MW2 clients,
you can't use the menu. You have to use aconsole command.
After loading the mod in the main menu, open up the console command, and type
replace "mapnamehere" with the map name that can be found in the game files.For example, if you want to load rust:
If you'reunsure how, find a tutorial for how to change maps in dedicated servers, as it is pretty much the same.
For chaos mode, type (I think, not entirely sure):
Edit: For those who are interested as to why this might be happening, I believe it has something to do with that one of the latest clients has implemented a more CoD4-style of loading games through the menu. The old command for launching private matches has been edited to create a kind of local dedicated server instead of xbox-styled-private matches. This mod never really worked well on dedicated servers.