Thanks damysteryman for your quick reply!
About DARKCORP, I sent e-mail on 18/5 but the links I received was for cIOSCORP 3.6. In case I find DARKCORP, should I uninstall cIOSCORP 3.6 first in order to install the newer version?
About the NAND backup, of course I'll do it, but I have BootMii as...