You probably mean PRV, not PVR? This has nothing to do with models. The PRV is compiled by the map compiler from the static level lighting.
When you need your model surfaces to affect the PRV, you can import them in WED as level geometry, or use c_trace and determine the lightmap value at the hit position.
But it still not working when I load precompiled wmb to a level however I still can get the lightmap value using the c_trace.
