OK for those of you who need it now, I have uploaded it to my website:
direct download:
http://www.imup2date.co.uk/battery.zip
EgoTrippin it may be worth using my BMP's in the file and posting the results.
I don't have the nano clone mine is different but the firmware allows 9 battery levels, that must suck having a permanently empty battery bar, I will upload some images of mine soon
To be honest I haven't really tried to run my battery out as I have watched a DVD for 30 mins so far on it (AMV of course) and it hasnt even gone down one. I am always on the PC and keep it connected so it is always charged.
I will also upload it to the themes section in the downloads.