You will need to download ifunbox from Lew's OP for Mac or PC.
Once you download that you will open it up and then you will connect your phone to your Mac or PC.
Once ifunbox recognizes and loads your phone you will look down at the bottom on the left hand side of the window and look for "Raw File System". Click on that.
Once you've done that on the right you will see a bunch of folders. Look for and double click on "Library". Then look for and double click on "Zeppelin".
Now you should be seeing folders with names like Nike, Apple, Android, and some others.
Open one of those up that you don't think you would use.
Get the images you want to use whether it's the eye of the tiger images or the LSU images and put them on your desktop. Make sure that they are named dark@2x and light@2x.
If using the LSU image the gold LSU should be named dark and the purple should be named light. The eye of the tiger doesn't matter as much.
So once that's done drag and drop them in the folder you have opened. Once they are in there, right click on logo@2x and black@2x and delete them. Otherwise you will get a black and white silhouette of the images or a black and white box.
Once you've done that go into settings on your phone and scroll down to zeppelin and tap on the folder that you dropped images in. This should then replace your carrier name with the image.
Typing all this out on a phone sucks.