Are there REB 1200 users out there? This easy to use program is for you!
The BookDesigner ("BD") program is used by many to produce text based ebooks. Now it can be used to make a quick and dirty Photo Album for the REB 1200. All colours are retained, but there doesn't seem to be an option to create a (grayscale) 1150 .imp.

BTW, BD doesn't know how to create a 16 grayscale image for the 1150 as it only produces B & W dithered images (as used on the REB 1100) 
If you look in the install directory for BD (usually 'C:\Program Files\Book Designer 4.0') you will notice a program called 'ImpGlue.exe'
If you run the ImpGlue program a window will appear asking you for Title and Author as well as place to drag'n'drop your images. Now these images MUST be in .png format for the program to accept them (just use irfanview to convert your .jpg to .png).
Tap the 'make imp' button and, in a flash, your Photo Album will appear. The resulting .imp is stored in the directory where your (.png) images are stored.
I shudder to think what graphic ebooks (Photo Albums) may be uploaded now...