Adding help pages to published content

I want to add help pages to my existing published content. These help pages will be content type specific and should be editable from within the content explorer.
I’ll also want to have links between help items.

My initial thought was to create a new content type “Help” with a page variant that will get published; then modify the global template to link to that published, content-type-specific help page.

Anyone done anything similar? Any suggestions or pointers to existing Rhythmyx published sites doing similar things would be very welcome.

BTW the templates are legacy 5.7 XSL variants