Thanks for the clarification to both about placing items. Bad idea... So a no go as for the cmd key, didn't know that tip. Thanks always nice to learn a new trick.
As for my first question, I found an option. I could buy the paid version and make a specific volume to which I was willing to share the password with the involved parties. Not the most elegant solution but certainly doable. I did read in the blog that they are working on this for version two coming out in the first part of 2013. So I might hold off with my purchase once I see what version 2 offers.