May need to re-think your mini guide above. This will not install IOS249 rev 14. And if you are speaking of playing from USB then patching the IOS you talked about won't do anything as the cIOS is used when playing from USB. This game should be loaded with IOS223 v4 not IOS249 v14.
Check what your IOS 249 is called. If it is v14 or v15 you are good, but if it says STUB you need to DELETE this ios. It's safe and okay trust me. If you deleted it, reinstall the IOS 36 from the main menu. This should leave you with IOS 249 as v14