Jon, thanks very much for the info.  :) 

I'm a bit clueless about HDRI lighting.  I'm just beginning to learn how to use it.  Actually, I feel a bit silly now...I just re-read the tutorial I've been using and I had completely missed the fact that you can use .hdr in Carrara.  blush

So, it looks like I'll be set with all those .hdr files I've found.  :)

Thanks again!

"You don't know what we can see
Why don't you tell your dreams to me
Fantasy will set you free." - Steppenwolf