You can use Torngat, which will automate the process(es). The application helps prevent you messing up your device.
- Cydia Impactor to install Application
- Torngat IPA
Install the Torngat App by downloading it here and side loading it through Cydia Impactor.
Afterwards, open the app on your device and tap the Run button.
Now, the app displays the various customizations that it can perform for you.
Now go and mess around with the settings, we do recommend that you stay away from device resolution though as it is known to cause problems if incorrectly done.
That is all you need to start customizing your device. If you do not like a change, you can revert it back to the stock. Are you going customize your device?