Originally Posted by blackbishop351
I think you lost me on that one, man...
i'm assuming that the extra compartment will be smaller so if the material for the main bag is laying flat on the table, lay the smaller fabric piece that will be the "side pocket" over one half of the main bag fabric.
the smaller "side pocket" will already have all it's edges hemmed. you would line up it's top w/ the main bags top, then sew the two sides & bottom of the side pocket to what will be one side of the main bag.
then sew the main bag together.
this may not be what you had in mind, but it's a though any way<g>.