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Since the dual-boot kernels require some specialized modifications to the ROM zip that are leading to a little confusion, I threw together an app that will take the zip for the "second" ROM and modify it to be compatible.



Currently the included file browser can be used to select files, or you can open a third-party file browser, such as Root Explorer, and use the send option on the file you want modified. Once the file is modified, the required folders in /data/ are checked and created, if they are not already there.



The next step is direct installation. Copying to cache instead of system is easy enough, but translating all of the additional install garbage in an updater-zip into live commands is where it gets tricky. This could be bypassed with the commands to gather a list of installs for recovery and send the zips there, but this will require some research to make sure one app works with every recovery.



Note to mods: The plan is to have the app become capable of also installing the kernel, the ROM, etc directly. This is a development thread.



Edit: There is a version available at https://play.google.com/store/apps/d...ecat.dualbuild for automatic updates