Well... Drum roll please....
I finally figured it out. All the info for the on-board NIC configuration is resolved and posted for everyones pleasure.
Check out gr8_brit
I've posted parts lists, some (rough!) pictures, the software you need, and the steps to make it all happen.
It's been challenging (as well as rewarding)
Sorry to you Linux guys, but at present it needs DOS to setup the Serial EEprom, but after that ... you get the drift.
I might consider making kits available to all if the numbers look right. I don't think I'm the only one who wanted this working? Or am I ?
Best of British!