added some comments for the DRprotein demo

ProxPython_for_Dummies_README.txt

@@ -91,10 +91,31 @@ pp.show()
 at the python prompt.
 
 7'. Did several graphics windows appear with lots of graphs and pictures? 
-Congratulations, you've just taken your second step into a larger world!
+Congratulations, you've just taken your second step into a larger world! 
+Ptyriffic isn't it? Ok, let's take a look at one final example... But first
+don't forget to type
 
-Now, to see that you've understood everything, debug Ziehe's code, because 
-the pictures show that it is not working properly.
+exit()
+
+1''. For this example, we already done the hard work for you. This time we'll
+run the ProxToolbox from using a "DRprotein_demo.py" script. You can peek inside it
+by openning it by your favourite editor, or even simpler type
+
+cat DRprotein_demo.py
+
+See how its got all the algorithmic parameters already in the file. Pretty neat huh?
+
+2''. Ok. Time to run the script! It going to take a bit longer... actually a lot longer
+than the first two examples (hours maybe). We can work on speeding it up later. Type
+
+python3 DRprotein_demo.py
+
+You should see some (boring) information about the problem instance, etc. While the algorithm
+is running you a report of its progress even 10 iterations, and will stop when the relative
+error drops below 10e-5. 
+
+If you waited long enough "Jmol", a molecular viewer written in Java (which you should already
+have installed) will open. Hopefully it looks like a molecule.