Creatig a New setof book and migrating data frm old set of book to new

Hi,

I have a problem, so pls try to give me a solution.

we have successfully Installed and working on oracle apps 11.0.3 from past few months, now we want to change the set of book to have a new calendar.

but we want all the old data to be visible when I query using the new set of book, what is the best method to do this ? and my new transactions should use the new set of book.

thanx