Sigil's Generate TOC can make use of the
title attribute.
Example:
Code:
<h2 title"1: Example Chapter">One<br/>Example Chapter</h2>
Whatever you shove in the
title will show up in the toc.ncx.
I personally use a Regex along these lines:
Search: <h2>([^<]+)<br/>([^<]+)</h2>
Replace: <h2 title="\1. \2">\1<br/>\2</h2>
Then depending on the book, I use a period or em dash or colon between the chapter # + chapter name.