[Scorpious2k]

Halas has one, and this may help: OpenZone can create them.

I have a zone I made with one, and can give you the file.

Because, OZ will successfully create the area (recognized by the client) you might want to either look at the OZ source or (probably quicker) ask Windcatcher about it.

EDIT...

My thought on this subject, btw, is that once we can identify the area and if a player and/or target is in it, we can add code to where it checks to see if attack is allowed against another player and allow/deny it depending on if they are in it.

Probably with a rule so the serverOp can turn it on or off. This would actually be a pretty simple add-on once we can determine the PvP area and a client's position in or out of it.