tnx for the usefull replies!

In order then I install:

Rootsh;
Kernel Power by x-terminal (with the command posted by michaaa62);
CSSU testing;

but blessn900 wont to install. I installed fcam drivers from x-term first and then blessn900 via f.a.m but nothing changed.

What is the correct procedure? Why when I re-flash the phone i found the firmware 20 and after cssu installation i found the last firmware?