Using Word 2003 with the docx compability pack to save a doc as docx results in a docx file containing VML elements instead of DrawingML for embeded images. As far as I know, the classes for the DrawingML package dml are simply generated from the corresponding xml schema definition file. If that is true, could you generate and add such classes for the VML elements?
These classes would save me some dom-node-hopping.