Overlay two images prior to saving to a file and printing with MERGE. You can merge the two images in different ways as well as smooth blending of just part of an image. There is a feature to batch-merge several images with one reference image.

Merge is a very simple graphic utility for overlaying two images or text in any relative position prior to saving to a file.
You can merge the two images in different ways as well as smooth blending in of just part of an image to the final result.
There is a batch merge feature which is useful to watermark all of your favorite pictures. Merge also allows text entry of any size, font and color to be merged with an image.

Here are the main features of MERGE:
1. Merge whole pictures with adjustable blending modes.
2. Rotate either or both 'source' images before merging them.
3. Batch Merge files with a single image - useful for watermarking your favorite images.
4. Type up or paste in text of any font, size and color and merge it with an image.
5. Smoothly blend in just part of a source image to the final result.
6. Using the clipboard: copy back result back to a source image and rescale or reposition it for remerging. This results in ineresting effects.
7. Set any relative positioning of the images on top, side by side or overlapping. See an example of a quadrant merge.
8. The image formats for loading and saving are BMP,JPEG,PNG,TIF,TGA,PCX.

The license of this software is Freeware, you can free download and free use this image utility software.