finally I have email...!
I contacted most of the Goethe-Institutes by phone. All have PCs, all(except for one) have internet-access. Many GIs told me, that their email/internet access is new for them and that they are just learning.... . So keep any solution simple. Another factor is that the transmission will go via translator while the GIs are on holiday or if it is easier for the GIs.
We started the big chain, the first sentence is in Sao Paulo now, we are waiting for the translation.
If there is stuff to see I will come to adaweb. Let me know!