Well here lies my weakness point. I never used backupmenu before literally never, so I don't know how things work with it. But installing is very logical, 5GB eMMC is okay. Well, first repartition, then restore, then extract NITDroid, then get KP with multiboot and KP bootimg, then fayad's backupmeu patch. If that did not work, try to first repartition, then install KP and multiboot with KP bootimg, then backupmenu patch, and then proceed with extracting NITDroid and installing its kernel.