sure we can haha ive seen the plugin on sourcemod and i think ive seen it somewhere before but you do need to bind a difrent button AFAIK to be able to talk to your team only (bind "key" blah blah)
It's a super fun But a bit hard mode for zombies. Iwe tryed it and i love it... It's hard to find a full server But i play usually on slag gaming mod madness. (Needs alot of players to be fun)