any luck with luck with injecting Hiroms at all, Earthworm Jim may have a good Chance, its 24MB same as earthbound and is classed as a Normal rom no extrasOffset 0x14 in the header tells you where the ROM ends. No need to compare sizes. Most of the header format is laid out here: http://gbatemp.net/threads/snes-vc-informations-about-the-header-and-injecting.417459/