My idea (at the Summit) was this:

1. Take first photo and it slides to the left, but leaves the right-most edge of the photo visible on the left side of the screen.
2. Line second photo up with first photo (live, on-camera) and take photo. This photo then slides over.
3. Etc.

Do this four times, or a thousand. Easy and wouldn't require (much) "stitching."

Tim