Originally posted by iTruceFret
Were you already updated to 1.23?
Ok, here's what I did.
On my 4.25, I downloaded the mw3 1.23 update with terminal, then I transfered to my 3.55, then I putted on this eboot and it should work :y:
Ps: Don't fuck with the other files like param.sfo. Only re-place the eboot and it should work like a charm.