Hi squeaker!
Have you already checked this??
www.iam.unibe.ch/~ducasse/FreeBooks/ CollectiveNBlueBook/greenberg.pdf.

This could help you to start with.

One important thing is that you must define the functions the VM will call
("loadModule()" and "char* getModuleName()", if my memories are good) if you
want to get it to work.

I don't remember much more, but I still hope this helps.
Mail me back if you have other specific problems.

Regards.