projector light

hi everyone ,
this is my first post on blenderartists forum although i have been using blender for almost 2 years.
i have a project and they want the light projected from the it to have a smoky effect like the image shown below.
help please…

You can try messing around with the Halo option of the Spot light.

i tried that but how do i get the smoke effect…

Smoke is a whole new different topic. Check it out here: