Hiding a shift light in the vent

I've been wanting a shift light, but I'd rather not have it just hangin out on my steering column, becuase it ruins the clean looks. A friend told me he's seen some people hide them inside the center vent. Has anyone done this? And if so, how hard is it and what is required?
 
Cool concept, but it isn't exactly a good spot. The point of a shift light is so you don't have to look down at the tach. But you would be looking down at the vent anyway:shrug:


Would be cool for the cool factor though I guess..