I think, KaKaRoTo's 4.0 HEN might not lead to any backup loading things like Multiman or Rogero do. But it may be able to play converted Retail-to-PSN games.
LV1/LV2 hacking need to go under complicated process and we do still have our keys back on those days that helped a lot for modifying the LV2 and rehash/resign it. Now today with 3.6x+ LV2.v2 now, its back to zero again, we need the keys (public keys to decrypt and private keys to re-encrypt) and we need to know what v2 LV2 algorithm have now.
LV1/LV2 hacking need to go under complicated process and we do still have our keys back on those days that helped a lot for modifying the LV2 and rehash/resign it. Now today with 3.6x+ LV2.v2 now, its back to zero again, we need the keys (public keys to decrypt and private keys to re-encrypt) and we need to know what v2 LV2 algorithm have now.