When instaling GingerLF evo CFW, I saw something like "128 MB NAND UPGRADING" and after that "4GB internal SDCard UPGRADING". Whais is that "128 NAND"? What´s in there? What happens when I turn on my tablet with the home bottom pressed? Does this 128 MB internal NAND is allways readed? Or the bootstrap process ignores everything but the external SDCard? Thx in advance.