Hmm... With hack what is connected to server so we need a cow at z8 office.
Btw that was joke but i think it would be possible but i think we dont have cow and never will have.
It ain't server sided, but if you got into the .rez and changed it you'd get an error regardless
I'm pretty sure CrossFire gun sounds have nothing to do with servers, but if you can hack the .rez files you'd be welcomed inside my company as a programmer/hacker...
I saw saidin once playing and asked him they are server sided if can belive saidin.