This function goes through your model, and exports every subsystem to a separate image. This is very handy when writing reports, you can have your script update your figures-folder for your TeX file automatically.
It can also be used together with the "LaTeX publish" option in Matlab.
When the second argument is 1 (boolean true), the function generates a file called simulink_images.m, which includes your images for you. Just run this file at the end of the file your wish to publish.
Hope somebody else find this useful, comments are appreciated