Make sure there is a space between "pico" (a UNIX text editor) and "/Library..." (the directory to your file), else you will confuse the computer. If you want to reinstall the system, select the option that will archive your old system and install the OS afresh, and see if it will let you install in German instead of English.
• 2.5 GHz MacBook Pro Core 2 Duo, 4 GB RAM, 320 GB hard drive, runs 10.6.8
• 1.6 GHz iMac G5, 1.5 GB RAM, 120 GB hard drive, runs 10.4.11 (out of commission)
• iPhone 4, 16 GB, iOS 4.3.5