@ixtab: Thank you for usefull post, unfortunately i replaced kernel too
I can get new kpw2 device for backup again, but i don't know how to run dd command without root access. I always use only modified diags part with known login/pwd (thanks to modders). Then i can backup everything. I hope someone grab original kernel or first 32MB of mmcblk0. Please send me PM if it is forbidden to public. Thank you.