The only ROM I have without cheats is micro machines v4 (#853) the #s I listed before all have cheats and I've tried all of the cheats in each list except for the DS Lite backlight codes. Diddy Kong Racing (#836) still gives me the "cartridge not inserted" with the newest update. 1331 is unable to save, rendering it unplayable. 1393 still loads a black screen and freezes there. I have become much happier with my purchase, though. The progress is steady and productive, and I'll do whatever I can to provide feedback. Thanks, guys!