For my own use, I have written a program to split large (40Mb+) and really large (250Mb+) images into sections as .png files so they do not take so long to load etc. If anyone is interested in having this, I can write some instructions and let you have it.
It needs the python interpreter and an image library but these are easy to download and install if necessary. Most Linux machines have python already and the image library is often in your distribution library.
Also if you have any other requests for programs, I might be able to do them if they are not too complicated. I am just learning python.
