Take a look at the product MSWordDocumentFS. It has these features, except it works from Msword-documents to html and pdf. It uses wvware to generate html and pdf, but if you do not have this, you can still take a looka at the source and see how it is done, and then, pherhaps implement it as a zclass.

...unfortunately I am doing the developement under Windows and this product is said to work only for Linux. Moreover, the HTML I have to apload in this ZClass has to be embedded in some kind of template to include header, footer and other html. Thank you Fabio