So, I have to be a subscriber or something to get the copy?  Is there somewhere I can download it?  I have never used Carrara before.  Is 2.1 worth the energy?  I know this is somewhat a stupid question but what does 5 have that 2.1 doesn't...   I mean, is there some place I can look up what has been added from 2.1 to 5.1? 

Thanks!
Azeiku