I've got lost of letters/forms in Word 2010 and its time to change out the header (its an image used for my logo).

Is there a way to establish a "master" document and have all my letters/forms tied into it where all I would need to do is change out the master document and all other letters/forms would also change out.

I do know there are software programs that will change out the header and footer but I've not been about to find one that will change out an image in the header.

Thanks.

IG