you can call a specific file from a menu line.... but I'd need to research the syntax.
[Don't accept this as correct, but I think it was something like (start "OUR_STANDARDS.doc") ]
Using that as a starting point... I'd save the manual as a Word document ... with bitmaps for illustrations... and open it from the menu in ACAD's Help Pulldown. Place the DOC and all related BMP's in the same folder.