I checked again, I took the chance and re-ran tr.apk, and clicked on "make it ra1n" again, i then went RootChecker, and it confirms i have root access.
So, off to superSU again, and it asks again to "The SU binary needs to be updated. Continue?"
I then say yes, and I am confronted with the "If you have a custom recovery like TWRP or CWM, that can be used to (try to) install the SU binary ..."
I obviously dont have a custom recovery installed, and if i understand correctly, the boot.img in the cm10.zip folder, would be the recovery right? If so, i wold then choose normal, because i dont have custom recovery.
If the boot.img is not the custom recovery, what is then? how do i get it?
i tried to fastboot flash boot.img, once again now, after making it rain, but before running superSU, but still gave the error, that it could not write.
What am i doing wrong? am i missing steps here?