What's the state of this project? It sounds very good.
The HGE class is complete and available in the downloads above. As for the helper classes, I completed all but one or two, which didn't seem particularly useful. Considering the lack of interest, I couldn't justify spending the time it would take to put together some documentation and releasing it properly.
If you particularly want the helper classes and you're prepared to live without docs, you can email me and I'll send it to you.