Hello teri,
you can do two things:
1) resize the original image to an aspect ratio of 11x14, for example to 1100x1400 pixels. Then I hope andreamosaic will create the mosaic with the same aspect ratio.
2) Before bringing your mosaic to the photo shop crop it to an aspect ratio of 11x14 using your favorite image program (like Paint Shop Pro or similar tools).
The solution 2 must work for sure. If you still have some problems then please ask the photo shop about the exact aspect ratio that you need. Or ask them to crop a little the image so you don't have a border.
byee
Andrea
