Here is the word from Westwood:
Hey everyone. Just wanted to drop you a line that we are aware of this Trojan horse program and are working to combat it as best as we can on our end, but we can only do so much. For those of you who have not heard, a user by the nickname of 'Flying Buzz' posted a supposed "Orca" mod, but in reality just a program designed to swipe your Renegade serial # and upload it to a website where the hacker can take it and use it for his own. We have already contacted the site's provider to have the site turned off and are investigating legal action. If you have installed this mod, you should uninstall Renegade and the all other Renegade files, then do a full reinstall. Thanks again everyone, we'll do everything we can to get the REAL Orcas to you as fast as we can, but until then, you should be wary of any .EXE program you download that isn't from Westwood.