Originally Posted by ext233
thanks for your reply. all i want to install are custom screensavers. i'm curious to hear other people's experiences too, though, regarding performance and battery life post-jailbreak.
It just adds a MR certificate to check the package signatures.
One (small) file addition.
In the case of the 5.2.0 ... 5.3.1 JB in this thread - a few other files, but nothing that normally executes.