I'm a little new to rooting, however I figured out how to install roms and kernels by surfing through this forum and trial and error. The one question I have is what is this whole deal with "nandroid?" I used easyroot to root my phone and used rom manager to backup my roms, do I need to do anything else in terms of backing up roms? Do i need to install nandroid? Is there any other safety precautions i should take?