Just thought I'd help out some people that were having trouble,
Here's a cab I've made of this registry hack according to post 1:
Code:
http://rapidshare.com/files/221506540/SHK_Customs_Battery_Poll_Interval_Changer.cab
Just copy file to phone or sd card, open up a file explorer, locate file, and execute it.
(If it asks for location choose device)
**Use at own risk. But I have used it to install the hack to my phone.