Doh! Idiocy strikes again! I supplied the .ini files from the day before my final update; I had re-named a couple of files, hence the discrepancy. All textures are already in your install. The correct four .ini files are all that has changed, and are now in place, and the entire, updated archive can be downloaded again from the same link in the top post.
Or you can ensure that the four .ini files look like this in the [FIELDS] section:
[FIELDS]
LowLand0 = NGNB/LL0.tga,2
LowLand1 = NGNB/LL1.tga,2
LowLand2 = NGNB/LL2.tga
LowLand3 = NGNB/NGNB_fields_simCity.tga
MidLand0 = NGNB/MD0.tga,2
MidLand1 = NGNB/MD1.tga,2
MidLand2 = NGNB/MD2.tga,2
MidLand3 = NGNB/MD3.tga,2
Mount0 = NGNB/MT0.tga,2
Mount1 = NGNB/MT1.tga,2
Mount2 = NGNB/MT2.tga
Mount3 = NGNB/MT3.tga,2
Country0 = NGNB/CN0.tga,2
Country1 = NGNB/CN1.tga,2
Country2 = NGNB/CN2.tga,2
Country3 = NGNB/CN3.tga
City0 = NGNB/Copra13.tga
City1 = NGNB/Copra10.tga
City2 = NGNB/NGNB_vulc.tga,4
City3 = NGNB/fields_sand3.tga
AirField0 = NGNB/AF0.tga,2
AirField1 = NGNB/AF1.tga,2
AirField2 = NGNB/AF2.tga,2
AirField3 = NGNB/AF3.tga,2
Wood0 = NGNB/NGNB_ForestGr.tga
Wood1 =
Wood2 = NGNB/NGNB_ForestFar.tga
Wood3 =
Water0 = water/water.tga
Water1 = water/water.tga
Water2 = NGNB/NGNB_reef.tga,-2
Water3 = NGNB/MD0.tga,2