Planning to buy Vray, but I have some questions

Hi all:

I proposed to buy vray to my company but I don’t know if it works on Max 7.

Also I would like to know if it can render stills in a network, I mean, several pc’s working in a single frame with full effects, like DOF, global illumination (irradiance map technique), etc.
I heard some people having problem with distributed rendering, is it fixed?

And finally, how many nodes include a single license?.

Thanks in advance

http://www.chaoticdimension.com/forums/phpBB2/viewtopic.php?t=9846

Thanks a lot