Thanks for the comments, they are much appreciated, it makes the time spent on this more worthwhile.
I've added a file that can be substititued in the scenary folders here:
C:\OBDSoftware\WOTR\WOTRScenery\Period\1939\Map
and
C:\OBDSoftware\WOTR\WOTRScenery\Period\1940\Map
That will change the campaign and briefing maps.NB. For some reason high resolution maps couldn't work in here, the locations were all completely off, maybe it counts pixels for locations? So I've just reduced the resolution and size of my high res map to work in here. This does of course mean that they lose that resolution and detail but I think they still work ok and look better. I probably will change the style a bit to look less like a folded map and more like how I imagine one on a briefing room wall would look, but not now.
NB. The positions were still slightly off for some reason, I had to add a slight top and side border and I think it aligns near enough to be used. If you find it doesn't then let me know.
https://www.dropbox.com/s/fj78rq8pqv10jyp/alt_low.bmp?dl=0I've never put a mod into JSGME, so if someone can direct me to a guide on how to do so that would be useful, all I've found is guides on how to use as the end user (which I know how to do).