Thanks to http://netenberg.com/fantastico.php I have now without any hazzle updated my B2Evolution blog from 0.9.0.10 to 0.9.0.12. And all done with just pressing to buttons and in just one minute it was all done, without any problems. What a great product, and even more thanks to my isp http://www.hostean.net for using cpanel and fantastico.
I have even taken a backup of all my blogs! I rule