I hard already created and saved a file recently, so rather than starting a new file I just opened the existing one and added to it. I ended up with a page containing three separate blog banners. Once I saved the file in MDS I saved it in a picture format (jpg) to my hard drive. I then opened it up in my photo editing software (3 separate times) and cropped the individual banners and saved them so that I can insert them into my blog when I want.
Here they are on the one page (8 1/2 x 11)
Here they are after they have been cropped and saved individually.