I don't know what photo editing software you have, but what I use (Ulead Photo Impact) has a stitching function that puts two scans together rather nicely. You can get this software (that is a few versions old) NIB for under $30 on the 'Bay (for Windows). I use it for large publications all the time. They may not look perfect, but they're good enough for a novice like me and someone with a little knowledge and more patience could surely do a better job.