Here's the easy one. Just place a dynamic light object where the static light is at(or around it...whatever works once you get this up and running) and instead of defining a color for it, simply make 0,0,0. Make your lightrange whatever you wish(should be consistent with the static light's range so the shadow is affected while the model is within the lit up area). This way, you will have a nice static light that affects the model's shadow and the dynamic light, itself, won't "mix" with it.

In my own project, I combine two dynamic lights with my static. One is as I described above...0,0,0 and a range. The other has a color and that color affects the highlight that shines on the model. I have my.cast turned off on this light, so it does not affect the shadow. I do this to eliminate the bright spotlight effect on level geometry. That doesn't look so good unless you are using fixed point cameras and can hide it.