Sorry... but I read the thread up to the words 'Arnold Schoenberg', and thought...F@#$ it. Never liked his music. Sorry I can't help.
In Arnold Schoenberg's Theory of Harmony, page 186, the author lists ways of generating secondary dominants chromatically. However, for parts 4 and 5, he omits progressions, for some reason. For those of you who have read this book, can you explain why he chooses not to show these at this stage?