after a lot of tries I was finally able to compile Cyanogenmod from source. So, thanks for your guide an your support.
Now, I would like to go deeper in compiling CM. First I would like to change from Superuser to SuperSU. So, I read some posts:
But I guess I still didn't find the answer.
May someone be so kind a give me an advice how to begin?
EDIT: Okay, got it:
1.) Download the UPDATE-SuperSU-vXXX.zip from the OP http://forum.xda-developers.com/showthread.php?t=1538053
2.) Unpack this file AND your built cm-10.1-XXX-UNOFFICIAL-XXX.zip
3.) Now overwrite the file system/app/Superuser.apk with the file from your UPDATE-SuperSU-vXXX.zip (same path!) and set the permission to 644 (by using chmod)
4.) Overwrite also system/xbin/su and set the permisson to 06755
5.) ZIP your cm-10.1-XXX-UNOFFICIAL-XXX files again and install this with CWM/TWRP.
Thanks a lot.