Use latest BiNPDA Security Manager v1.10 for install your all unsigned files easily. Simple, just install SecMan.sis on your mobile. Execute it and choose "Install root certificate" section from settings. After that RootSign your unsigned file on PC using rootsign.exe. And finally install xxx.rootsigned.sis file on your phone. Also you can see all system folders by using SecMan. Similiar way. Choose "Turn Plat. Security OFF" option from settings. That's all.