The only problem I had was that module.ini thing you did, once I changed that to be 110 to -110 or whatever I was all good.
I used whatever size map Thorngrims generates by itself though, I think I just needed slightly larger boundaries for the camera in the corners.
You are dragging those Red Boundaries Walls back in Thorngrims right?
Uh scratch that I didn't see who you were (I love Onin no Ran man ahaha).
Anyway I did all that (within those parameters) and it all seemed to work for me.
And on a possibly related note:
A couple reasons some people have that "can't walk here and there" bug is because they either got some mountain transition tiles semi-invisbly mixed into their map or they started out with a new totally flat map and didn't raise the entire thing up a little from the sea level, for some reason a totally flat map is full of those "can't move here" things.
Or at least it was that way for me.
All I had to do was go in with the Elevator Tool set on Huge Radius and Hardly Any Elevation and spritz the hole map a couple times and suddenly I could walk everywhere heh.
Thorngrim fixed the one real problem I had while I was working on my map in his latest release (incompatibilities between the 80x and 89x party files), and then he added a bunch of new tiles we could play with and let us twist the towns and cities around on top of it, the guy is awesome man.
Maybe there's a problem you are having with an older version party.txt file or something? Something definitely changed, the version of Thorngrims I was trying to use at first couldn't save a 89x parties.txt file so I just learned to do that all by hand.
I didn't have any problems using a thorngrim-created 80x map.txt with an 89x mod though, as long as I did my own parties.txt for it and got rid of the one it generated.