As I noted in the other branch of the thread, you could have use remote desktop to do this, like follows:
Start->Control Center->Internet & Network->Desktop Sharing->Allow Uninvited Connections.
This is (sort of) the GUI equivalent to the RealVnc stuff you did...
I didn't have a lot of success with that - mainly because I'm trying to launch it all remotely. I tried running the krfb app via ssh -X (yes I checked to make sure it was the remote one and not the local one that was running). but... it didn't seem to work - was getting authentication errors etc. Connecting by ssh, and launching vncserver on the remote machine when I need to connect is good for me - especially now that it's all configured, and I know what has to be done on the other remote machines. This way I don't have to rely on someone at the remote machine to correctly launch the krfb app etc.
P.S. Did you turn on SSH compression?
Yes. I set CompressionLevel 9 in the ssh_config file, but don't see a lot of improvement in the network load. C.