Amigamance : what special .chm file you need ? You've lot of ebooks ?
Only old "Windows2000" CHM v1.xx seems documented. On Zindoz you could use the HTML Workshop 1.31 program...
Obviously the v2.xx CHM version (Windows XP) is not yet well documented.
Avoid to use those filformat (just a proprietary M$oft format) that seems just html and rdf files and images joined and compressed in LZX advanced method...
All Linux and MacOS X viewers seems use
CHMLib that was not yet ported on AmigaOS / MorphOS i guess...