Add the sources
And download Ifile (costs money, but look up a source on the Internet for free)
Download Mobile terminal
Download multiplayer patcher from the source that ends in intyre.
Delete minecraft from your multitask bar
Go into mobile terminal
It will ask you for a password, it is alpine (unless you changed it)
Wait till it says done.
Then go into Ifile and go into /var/root/Documents/Cracked
Copy the minecraft file there
/var/mobile/Documents/Installous/Downloads and paste minecraft there
Then go onto installous and install the app.
This makes it so you can modify the app.
Delete minecraft from the multitask bar if you played it.
After it is installed go to mobile terminal again and type
mp.patch (enter ip here)
Then it will allow you to join their server, if it crashes Respring your device, if you want to change the ip address again don't do everything again, just go back to mobile terminal and make sure minecraft is off of your multitask bar, and type
mp.patch (ip address here)
And it will do it again have fun