CrazyDawg, the image looks great. I'm happy it worked for you.

As for the size of the shadow, like MorriganShadow said, play around with the light casting the shadow. Try moving it closer or back, to the left and to the right.

For the picture that you poseted above, I believe moving the shadowed light back from the model, would make the shadow smaller. If moving it back makes your scene too dark, you can always add another non-shadowed light to brighten it up again.

I personally like the image...it makes it look like it is later in the day...when the shadows are longer.