Not in the demo afaik, but there'll probably be a server command for it in the final.
I don't like open-ended games either. MS CFS1 and 2 are the biggest examples of why games should be sealed, though it can't be denied that games like HL benefited hugely from third-party mods. If only there was a way to have legit mods allowed but the hackers kept out. Oh, there is! It's called Il2.
------------------
SSDivisionWikingSGW
