Tutorial:
1.
You Download the last version of
NPLOader
install it in seplugins and write the Plugin in Game.txt in seplugins
2.
Gods Eater Burst (Patched For 5.00 m33, Gen D & Pro CFW)
take this (i try it with patched and unpatched with Prometheus 4)
3.
I take the iso from here
4.
Put ULUS10563 filer in
ms0:/PSP/Game/
5.
Put the ISO in ms0:/ISO
(you do not have the iso name change)
start the Game
6.
you save your character
7.
you see by loading of char this

8.
now in the game you see all Level Pack
when you go to select missions there is a section about downloadable content/missions
Look here
Have Fun
thx for Tutorial by gerardnr and tip for DLC by Vampire