I can't wait for your feedback: comments, suggestions, bug reports and complaints. So wait no longer, and head for
www.stack.nl/~stefanvz/bsol/. There you will find all that's needed to get you started. Good luck!
Yours readily,
Stefan
EDIT: I just tested the program on another computer (for the first time), and I noticed that things went terribly wrong in step 7 of the tutorial. I have no idea what caused this. If you experience the same problem, please say so. It is this: instead of returning the average colour of the image, the result of the procedure is just some gray colour. The program works as it should on my programming computer. I stop the investigation now because I have homework to do. I will try to upload a corrected version as soon as possible.
EDIT2: I made a work-around that appears to do the job. Updated versions online at the same place. People who haven't downloaded yet will download the new version anyway.

