OK thanks Matant. Definite progress. I've got the urls mapping correctly by tweaking the setting.php file.
But now it won't let me logon or register and no matter what I put in the username it keeps telling me that field is blank. More TWEAKS are obviously going to be required!!!

This is payback for all the times I've trashed Microsoft and declared that UNIX should have been the PC OS all along. Joking aside MS has robbed more hours of my life then all the other OS's put together. UNIX is pretty damn stable once you get used to it again.
So, I'll keep plugging away but a few hints like the one Matant gave go a long way for me.