HI.
So after a while of labouring (Thanks to everyone for their help) I managed to make a first semi-workable map.
Yet to play it.
However, one glaring problem is that it's 11 players when it should be 10.
I have no idea where the anomalous 11th spot comes from.
There are only 10 armies allocated under the FFA.
It's probably the reason why I can't open this in Hazard's marker editor either.
IT's slot 8/7 that the problem lies.
I opened the _save file, and wondered whether the reference to army 11 is the issue? I don't know though.
Thanks for any help you can give me.