Thanks for your reply. I have had a little progress since my last message - My problem was in using Panel Studio which I think was messing up some of your settings once I re-saved the panel and preventing the AP and Nav boxes from working properly.
I now have a panel sort of working with the instruments from ISG although to operate it in LNAV requires quite a convoluted ammount of button pushes.
Thanks again for all you help and your excellent panel - you must have worked very hard!
Has anyone succesfully installed the GNS-XLS from ISGs suite - I have come close but am having great difficulty making the AP work in LNAV from the GNS and also when I install the gauges for some reason the VOR/ILSs are not 'tunable'. If anyone has the Panel config or other tips I would be most greatful - I'm having difficulty understanding the full installation guidlines that come with the ISG product.