DESIGN A TEMPLATE FOR FOLDED NOTE CARD

I NEED TO HAVE A PRINT-READY TEMPLATE FOR A FOLDED CARD IN A6 SIZE. IT WILL HAVE A PICTURE ON THE FRONT MAYBE WITH A DISCREET BORDER AND THEN A SMALL COPYRIGHT TEXT AND CONTACT DETAIL ON THE REVERSE. THIS CARD WILL BE FOLDED SO THIS IS PRINTED IN ONE-SIDED FORMAT. THE CARD WILL BE FINISHED SIZE OF A6, SO THE PRINT PROOF WILL NEED TO BE DOUBLE THIS. I WANT THE TEMPLATE TO BE SET UP SO THAT I CAN EASILY CHANGE THE PICTURE ONTHE MAIN COVER WITHOUT CHANGING ANY OF THE OTHER ELEMENTS OF TEXT OR PICTURE BORDER. MUST BE OPENABLE BY WINDOWS BASED SOFTWARE FOR ME TO AMEND. I WILL WANT TWO OR THREE OPTIONS OF DEISGN FOR ME TO CHOOSE FROM