I'm from DarkyRom v10.1 RE
- Open DarkyRom configurator and untick "wipe"
- Go for recommended kernel & modem
- Did NOT need to disable lagfix
- Download JVP (CWM) and put in into your internal sdcard
- Flash JVP via CWM
- Install SGS Kernel Flasher from Market
- Download DarkCore JVP and put it in your internal sdcard
- Flash DarkCore JVP using SGS Kernel Flasher
DONE. you are up to date.