Well, some games also still need sys_param patch (which i as of yet don't know how to do) otherwise they still ask to update and/or blackscreen.
figured that part out already:
i managed to pull the files while it's busy to check it out the differences
now i can see it looks for "sys_param" in the decrypted EBOOT.ELF and changing it to 00 34 00 01, it puts the file in the TEMP folder EBOOT.BIN while EBOOTMOD is doing a "make_self" on the ELF
Couldn't find this in Dead Island eboot though..