Thanks Oshyan, I've spent quite a lot of time recently going through some older topics, which has accelerated my learning curve no end.
For my first shot from low orbit, the solution was extremely easy, knock up a sphere and copy the planet dimensions in.
So proceeding on with that at the moment.
I've also solved how to use image map to solve weather formations of clouds. I have a specific reference shot to try and copy, and although it won't be dead on, it will still be interesting due to the terminator and shadows moving. It would be good to get some movement in the clouds too, but one thing at a time.
After that I'll work out how to use the LWO node.
Could you possibly direct me to some of JimBs posts where he talks about workflow, if you can remember off the top of your head.
Many thanks
Jon