-Optionally, download and compile:
-- gnunet-gtk to get a GUI for file-sharing and configuration.
+Optionally, download and compile gnunet-gtk to get a GUI for
+file-sharing and configuration. This is particularly recommended
+if your network setup is non-trivial, as gnunet-setup can be
+used to test in the GUI if your network configuration is working.
+gnunet-setup should be run as the "gnunet" user under X. As it
+does very little with the network, running it as "root" is likely
+also harmless. You can also run it as a normal user, but then
+you have to copy ~/.gnunet/gnunet.conf" over to the "gnunet" user's
+home directory in the end.
+
+Once you have configured your peer, run (as the 'gnunet' user)
+ gnunet-arm -s
+to start the peer. You can then run the various GNUnet-tools as
+your "normal" user (who should only be in the group 'gnunet').