I thought I saw it mentioned in my searching last night that it just needs to be copied then unplugged and plugged in to take effect(?).
-edit- Here's the page:
http://www.nuerom.com/BlogEngine/pos...rgee280a6.aspx
I grabbed it the hard way and overwrote.
I'll run the battery down watching a movie and see what happens.
Plugged into the care charger and streaming Sirius it's still draining around 100mAH more than it's charging.