Try adding a vertice, on the model, that is rougly 500 quants in front of your player then do something like this:

vec_for_vertex(temp,my,vert#);
effect(effectstuffthatgoesinhere);

There is a good example of the above stuff in the WDL manual.

That is the only thing I can think of ATM so if that doesn't work then I sure won't know what will.