Quote - There is no option for shadows on IBL.  You would like your shadows on Infinity lighting which, for daylight, is your primary light source.  For test renders, set back your settings but not so far back that raytracing suffers.  Once you work out your lighting for the scene, then scale up your settings for the final render.  Remember, you are only working with 2 lights.  The renders should go quickly. 

Maybe they should go quickly with only two lights but the last render i posted took a couple of hours to render and it only had two lights. I only have an AMD 2800+ for a processor and only a gig and a half of ram.