I'm working on a photo thats 640x480 (landscape) and need it to be between and 1519x1270 and 3038x2555 for a program that makes photo album-books. It's the front cover. I'm pretty good at photoshop, but never learned how to do enlargements. I use a Mac, and please use only photoshop. I know that you can't just simply enlarge the photo, so will someone walk me through the process? Thanks a million.

