Here are the (impassable terrain) fixed maps and new textures that will appear in beta 8: SWbeta8_maps_textures_stats. It's a 24 MB download. This package also contains the castle maps which I worked on tonight, and a set of unit stat files of which only the MP unit stat file is different than the one in beta7. I replaced the castle towers with one of the smaller keeps, and the castles now look a lot more like they do in STW/MI.
To install this package to STWmod beta7 first delete the \Savemaps and \Battle\Maps folders or all the maps in those two folders, and then unrar this package to your main STWmod beta7 game folder. Let it overwrite the texture files and the stat files. All the maps will be installed to the \Battle\Maps folder, and none to \Savemaps.
Bookmarks