This is a picture of Andromeda Galaxy made from your example data sets. I used the red and blue channels and the green channel is a composite of the blue and the red. I did not use the "i" channel.
Softwares used are:
-Deepskystacker (freeware) for aligning and resizing.
-Photoshop for coloring greyscale images
This fits liberator image is not available for sale.
Stéphane Reeber & the ESA/ESO/NASA Photoshop FITS Liberator