How to import existing lightmaps for use with Beast?

I have a model with a nice lightmap created in Max with Vray

I remember reading that you can use existing lightmaps with Beast, but so far have not figured out how to do it- that is, get my lightmap into the system so that it is automatically added to the object using a regular shader and swapped out for dynamic shadows when within range just like the lightmaps generated by Beast.

Thanks in advance for any help

You need to use one of the pre-existing lightmap shaders to achieve this or create your own.