Working on '09 and '10

Hi All,

I am new here (so excuse me if this has been answered multiple times. I can not find my answer) My company will be upgrading to 2010 (a little behind, I know!) while maintaining 2009 on the computers as well. I saw a document with tips on doing this.

ie. How the 2 work concurrently, working on 2010 how will saves work with 2009?

Does anyone know where I can find that document or can share any information on running the 2 years simultaneously on the same computer?

Thanks in advance!

SolidworksApi macros