I do wish you luck with that. That'd take some insane scripting AND an src modification to get it to work, if I'm seeing this the way you are. At the least you'd have to script a new object (or several) to represent emeralds, but they ACTUALLY are rings, and there's no normal rings in the map. You'd also have to implement SRB2CB's Ring mode into SRB2's src, add some modifications so it looks at a player's rings instead of their team's rings in the base. And then some.