I don't know I this is legal or not but anyway here you go.
Note that this method isn't a "ifile" method.
Also note, you will not get all of the admin customs, there are just few of them.
How to: (iOS method)
Backup your device, once backuped, go to "Music > ITunes > Media > Mobile Applications > Highlight GraalOnline Era, right click and open it with WinRaR.
Go to payload > offline > images.
There you go.
Note that the admin heads are kinda old because the last date they were modified was 2012.
You can also check out some other things, there are templates,hats,tile sets,NPCs and all that.