Erm... no, that's not what I meant... I don't really know how to edit WADs... I'm talking about using an in-game cheat or something. I mean, in Sonic 3/S3K, once you got the emeralds you could go back to the first zone and use them to go super (or hyper), and in Sonic 2, you could use a code to get the emeralds... I would ask why you didn't put an save-disabling Emerald code in SRB2, but the likely answer is: "We didn't want to." Oh well.