Dinonykos has done something wonderful with the tall wall format. He is extended the width of the views so that the walls can appear to overlap. All existing tall walls can easily be put into the template if the user so desired.
Plus, his template is a grid showing how the perspective should go for normal _and_ upper story walls.
http://dungeoncraft.forumsplace.com/message57.html
Just scroll down until you find it.
