Hi paul,
I was really poor in framing my question, may be due to lack of knowledge.
In one of your examples of contentcontols, where selecting an item from dropdown returns the email id, fax no, etc of selected item. I'm trying to have the same thing, on both sides of the document.

So that when i select my customer name from the dropdown on left, it returns the phone and fax no.
similarly when I select my dealer name from dropdown on right, returns the phone and fax of dealer.

Thank you very much for taking time on this.