I want to send a file in to an online store to be enlarged. I use photoshop 7.0 for my editing and shoot a canon 20D on large file size. I was wondering if when sending in my file, should I leave it the size it was origionally taken or use "image size" in photoshop to adjust the photo to the size that I want. Also, I know that dpi is a printer setting, but does it matter what resolution I save and send the file to them?