VRay40.dll

Hi .. im new to Vray so if this Q is off topic just point me in the right direction..

i DL the “V-Ray 1.09.03m Max 4.x/5.x Free” but all dlls are for MAX 4.. and its only VRender40.dlr that max does load in.. the VRay40.dll is “not compitable” so.. i can render whit Vray.. but i can not use Vray lights etc…

and one other Q

whats the diferent between free/demo

and why is the manual for Vray 1 .. when the program i 1.9 is there any big diferences betwen them or is the manual still “good”

PLS help me find the VRay50.dll and VRender40.dlr and any other files that MAX 5 needs ..

pls exuse my bad english