On printing, create two separate printer drivers on the computer, one for Tray 1, the second for Tray 2. See how that works. Word sees that as using two different printers.

On the ribbon modifications. I can't stress enough that the modifications you are making to your computer through the Word interface cannot practically be duplicated or shared except through going through the same work on each computer. If you store them in a template using an XML editor, you can share your modifications without overwriting any that may already exist.