A new Custom Firmware Modification was released for 4.70 CFW, XMB Lock (v1.00) by ErMaK86 & Echo6vi will allow you to lock (disable) your System Settings, Network Settings and then also your System Update from being used or setting changed. This utility can be useful if you are nervous allowing other's such as family & friends using your console. As they can not do any major damage from the XMB.
This tool for CFW 4.70 will protect your console's settings locking the System settings, Network settings and System update.
The tool also allows to install a System Reboot option on XMB for any CFW 4.70 Cobra.
Installation: Once you have made your choice of settings, please install the XMBLOCK REBOOT.pkg enter the homebrew and select the activate lock.An want to make changes to settings then deactivate.