Hi Freemangordon,first of all thanks for your support for our lovely n900.I am with u-boot by Pali and kp52,and every time when i installed cssu-thumb always stock kernel won't boot.Never mind how many times i trying with u-boot-update-bootmenu or flash only kernel the result=0 i know that,if i not with kp51,kp52,the cssu-kernel taken their place,but is there any chance to live together cssu-thumb+kp51,52+stock kernel