Thanks Mark....I appreciate the complete answer..

BTW to other forum readers....(who are not already gurus) ... I highly ecommend Mark's tutorial at VTC.com...I've got the other Carrara  videos/books...and got the most use from the VTC series.  Plus you get access (if you do the monthly option) to all the other VTC tutorials.   (Better than Lynda.com IMHO.)

Barrett