Editing chapters in m4b

Is there a howto/faq related to editing m4b audiobooks chapter info?
In particular, can chapter timing be changed? Or added if there are no chapters?
Is there a way to import say a cue file and create an m4b that will work in audiobook players, like Smart on Android, or iTunes?
In earlier versions I found that adding a cover image to an m4b had the side effect of trashing chapter titles. Has this been fixed?

See the changelog for new features and fixed issues: