not at all Dave it's all to help, here's another:
https://en.wikipedia.org/wiki/Three-point_lighting
Adding a fill light is quite normal. A simple google search would have revealed that. Try a very soft light so that shadows are minimal. The link will explain in more detail. How do you think they get rid of hard shadows on movie sets? With a fill light/s.
Edit:
By soft, I mean large enough that its shadows are not very noticeable. Also, bring it quite close to the camera, then try moving it around a bit, so that it fills in dark shadows cast by the key, but doesn't cast strong shadows of its own (and also so that it doesn't flatten the image out too much).
I tend to avoid non-shadow casting lights but whatever works for you.
Last edited by gubar; 14-03-2013 at 06:23 PM.