I gave many hours trying to identify what was wrong with their instructions. And after I found crossing informations - even in Chinese - I did a good brain "compilation", many tests, googling and found the solution. It is my obligation to present what I found because as I saw in ns-2 mailing lists many people wanted to simulate GPSR. It is true that they didn't google and wanted to get the solution from the others ready-made. But on the other hand I didn't like the fact that there is nothing concrete.