The thread is here:
http://eqemulator.net/forums/showthr...pvp#post151127
The PVP areas are marked in the 'Water Maps' (.wtr) generated by the version of awater in the utils/azone2 directory in the SVN. (Only supports .S3D zones).
The code to make use of this information never made it into the zone source as far as I know. I'll put it in when I can.