I have a Hyundai Play X900 quad core tablet that I'd like to install a custom rom on. But if I'd want to goback to the stock firmware, rooted Hyundai ver 4.2.2, it won't be there to restore to. Where is the system firmware backup that is used for factory restore located at? I thought that if I saved that folder to an SD card, then I could copy it back later for restoring to stock. Or, how do I make a backup 'image' file of my installed firmware? All that Titanium Backup does is make a folder and fill it with all the individual files and apps that are on the tablet. Rom Manager says it can't work on my model. I'd like to make a firmware 'image' file that can be reinstalled with RKbatch tools.