Since there has been some interest in S2SMS hacking recently, I've been putting some thought into writing a few tutorials. I've already started work on a tutorial for adding a new badnik and I'll be fleshing this out over the next few days. I'd like to get an idea about what tutorials people would like to see. It doesn't have to be specific to the Sonic 2 engine, it could be related to the SMS in general. So, what should I work on next?