I'm coming to the modded Xbox scene somewhat late in the game, but I am interested in emulators.  I currently have a modded Xbox that has a "game" in the XBMC Program's directory called CDX, which loads a menu with NES, SNES, Sega, etc.  However there are no portable or MAME games.  So my first question is, is CDX just a menu frontend or what?   Second question, what is the current state of Xbox emulation?  I've done some reading and came across the BAED disc sets (Disc 1, 2, 3A, 3B, 3 Extra); are those the most current discs?  If so, do I need ALL the discs or just the latest #3 discs for the complete set?  I also ran across BAED Evolved, so I'm even more confused now.  What do I need in order to have the quote-unquote complete set?