To generate a firmware, run (paths may differ): $ make $ ./fwdecrypt R0.ROM $ sudo ./patch-firmware.sh files . # needs sudo $ ./fwcrypt R0.ROM After that, R0.ROM is patched and can load Rockbox. rockbox.sh is a script to put into rockbox.zip. It's a small loader script that sets stuff up. files/lib/modules/si4709.ko is a replacement kernel module for fm radio support, its source code is packaged in ./si4709.7z.