If you wanna disable green key light while charging- follow these steps:
1) Download this file: no green light while charging by localh0st(symbianzone.co.cc).rar
2) Apply in RomPatcher Open4All patch.
3) Copy "private" folder into C:\ drive on your phone, and replace all.
4) Just reboot your phone after all, and enjoy!
Credits to localh0st of Daily Mobile