Hi Freemangordon,I already tried with both(kp52 and kp53) First I install u-boot and backupmenu *install manually kernel-power(power,modules,headers,bootimg,flasher and settings) *install community-ssu-enabler *run community-ssu-enabler(just press on him) *thum2 installed correctly(before reboot the phone it's shows one title your oper.... system is updated.....) *till here(black screen) regards note:this is not my first install thumb2 I have other n900 and hi working without any problems with thumb2