As for backups, I'm not sure about those, I'm using the code from http://github.com/kakaroto/PSFreedom, I'll talk to KaKaRoTo about it, afaik you can use custom payloads and shellcodes, but again I'll ask how and add it to the UI
/opt/psfreedom/modules/omap1 /opt/psfreedom/modules/power40