Hi I need some help. I have version 3.4E and I followed this guide: http://lifehacker.com/5518518/how-to-back-...rnal-hard-drive ...to install Homebrew Channel and USB Loader GX. Now, I would like to install 4.2. I already found this: http://gbatemp.net/index.php?showtopic=184057 ...but I don't know if I need to do anything before. I will do a Nand backup with BootMii, which I haven't done yet. Is there anything else I have to do before and after the update? Thank you in advance.