FSK-JoKeR

Hello Folks, i've got Win7 Ultimate x64 with the German LP in my company I'm installing the W7 unattended over WDS. My problem is, that i must switch the standard language from english to german after the setup is completed. if it goes by GPO or regedit. but actually i couldn't find all needed tweaks to to this. until know, i could switch the keyboard layout and the shown language. but i must switch the location from USA to germany and then the and here are some screenshots. (the red marked are my problems. ill hope someone could help me.