2406B using Open AT 3.1

I am currently using the Open AT 3.1 which has built in 657c firmware in its IDE settings .
The q2406b that i am working with has 641 firmware preinstalled.
Therefore i am guessing that in order to work with this Open AT (3.1) version and download projects to the 2406b , i would need to add to my IDE firmware setting path the same files that i have for the 657c.

Are there any other changes that has to be done other the this in order to use this version and is it possible at all to add to a newer Open AT version a firmware that is suit to other products ?