Thanks for the reply, nope i have both of those and its not doing anything. Here some more details if it would help. I have added the latlong_lens.mi to the '/Mayax.x/mentalray/include directory' and the latlong_lens.dll to the '/Mayax.x/mentalray/lib directory'
Then i have copied the render_latlong_lens.xpm and latlong_lens.fti to the '/Mayax.x/icons directory'
Have then added these lines to my maya.rayrc file.

link "{MAYABASE}/lib/latlong_lens.{DSO}"

mi "{MAYABASE}/include/latlong_lens.mi"

Then loaded the latlong_lens.mi in maya under the mental ray shader manager.