Some test images that were successful.
1) Interleaving/non-interleaving run through wordpad
2) Mainly just messing about with layers in photoshop after editing in Wordpad –
3) RAW file opened in text editor – then altered. Can be tricky to keep the image stable, so it can be opened again.
4) Opening the image (JPEG) with a text editor, and then altering the code, deleting, rearranging sections.