Haha, way back in the day. Just a note about my tutorial, it's very simple and you should use it just as an explanation of the terms and concepts involved with Static engines. Don't use it as an actual engine. (Well, for a Sonic game, anyway. You can use it for like, Mario or anything that doesn't require actual true slopes.)
edit: faarrrrk 2004? that's insane. i still remember making that.