What green screen problem is supposed to be solved by this? If you patched the game to IOS249 and then launch it with IOS222, the game will load IOS249 itself and then crash. Both cIOS work in a similar way, but use different incompatible methods to open a game .iso and mount it as inserted dvd.
Did you just manage to start the game? Or did you manage to get till actual gameplay, running, jumping and shooting? I have a report that the game restarts during loading same as Gamma and SoftChip do when the game isn't patched or when you use the incompatible SoftChip version with a patched(or unpatched) game.