Hi,
you could have a look at the export pages:
http://www.dokuwiki.org/export
I had a go at DokuWiki2HtmlHelp a while ago
I remember posting (2 months ago at the most) on a DokuWiki2HtmlHelp related page but can't find it.
See here as well:
http://forum.dokuwiki.org/post/8153;nocount