I've registered my store-bought game online with this website using my e-mail address and CD-key, and now I want to register with Ironclad Online (through the game) so that I can see what the online multiplayer action looks like. Do I need to use the exact same e-mail address that I registered the game and CD key with, or can I pick any name (and not an e-mail address) and any password I want for the in-game registration (with that same CD key)?

My concern is that if you guys get the same CD key with two different user names that my key will get invalidated and I don't want to risk that. Thanks.