In reply to Bob:
As far as I know, there is no English guide available. However, there is a topo-guide with very clear symbols and diagrams. It's published by Röther and has something like "Süd Bayern Nord-Tirol" in the name. Sorry, I don't remember the full name, but I bough it for the library of my Spanish climbing club, as it was the best guide for non-German speakers that I found. There is also a CD (sold seperate) which complements it with maps and photos.