Maybe someone with a little more experience can tell me what am I doing wrong. I follow the steps as mentioned in the installation instructions:

1. Download F.D.B. Theme Installer
2. Copy the content of the zip file to root directory of N9 via PC
3. Open Terminal and type:

devel-su
Password: rootme

4. sh /home/user/MyDocs/theme-install_FDB.sh

Once the script runs I get lots of not found errors after which i get lots of red blocks on my screen. The only way to get rid of it is to restore from backup.

Please let me know what am I doing wrong.