Some maps are broken up or edited to allow for seamless transitions instead of needing several warps. (Area 1 is split vertically, Area 2 needs a horizontal split. The connection between area 1 and 2 also will have to be shifted up from where it is in RBY to prevent border blocks showing up where they shouldn't.)
Ported from Pokemon October.
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Alterations have been made in that the treemonset has been diversified a bit further, having Munchlax like in DPP. They're L60, intended to be used in Nihon.
I haven't placed the grandma in the region yet, intending for her to be in Old City.