I really should investigate further first....
It seems I have found most of the information. I do apologise for wasting your time again..... Karand's answers were correct, it just took a while to figure it out exactly..... but that's a good learning curve.....
I have settled for the following:
Tunnel-Password ---- Check
Tunnel-medium-type - IP ---- Check
Tunnel-Server-Auth-ID (If it's hostname, I have enterd the LNS hostname) ---- Check
Tunnel-Type - L2TP ---- Check
Framed-address - xxx.xxx.xxx.xxx ---- Reply
Framed-Netmask - xxx.xxx.xxx.xxx ---- Reply
If you can see anything wrong with that please let me know, otherwise I will close as accepted?
Thank you