It probably wouldn't be too hard to implement, and it would be nice to have, but until then, you can easily update any parameter you want using the "Basic Z-Wave Tool" driver. You switch your device over to that driver, make the changes you want, and then switch back to Eric's driver. I do this all the time with my Fibaro Dimmers.
Only the parameters configured by Eric's driver will show up there. So again, you can view and edit this parameter in the Basic Z-Wave Tool.
What exactly do you mean by this?
