Lloyd,
Thank you very much for taking the trouble with this thread, and thanks for the offer to remake the howto.
Would you consider including some post script about prerequisites for workstations on the two LANs connecting to and using the tunnels.
Also some info on if the tunnel may be verified to have been used for a particular transmission - rather than another, unsecured route.
Meanwhile, I'm ploughing through the freeS/WAN.org site and feeling a little more comfortable with my failure.
Thanks
David