.iso file modifications - Gamecube game

Hello, you wanted to take on my job. Can you modify .iso files and repack them. Have you seen ssbm game hacks and can do edits to game I want? which is wrestlemania x8 for gamecube Edits I want done to the game: 1. Removal of TLC match 2. Removal of Single player (this will free up memory on game to add more) 3. During Royal Rumble I want it so when you are out of the ring the player does not disappear. They can walk around and attack but not return into the ring. I also want it so weapons can be grabbed from under the stage and used to fight outside and thrown as usual. 4. In Royal Rumble I want it so when the countdown reaches 0 and the next player has to come in for them to have a weapon as they come in. The hammer. 5. New game mode added in called "Referree Mode" this should be a Fatal Fourway match but the referee should also attack and fight. He should be given "Triple H" moves. When a player pins another he will run and do the countdown as usual, but then return to fighting. If the referree is not made playable then a 5th character and for him to be "Vince McMahon" however he does the same as a referree and pins when possible. 6. On character customisation I want it so you can edit the "SuperStars" clothes, ability and all other features which are generally locked.