First off I have not messed with flash carts since like 2008 when I had a R4 for my dslite and I never had any issues. I just loaded the new OS and put roms on it and never had any issues. I went through the noob forum, but I am just lost with all this stuff. I just want a simple OS to put on here that will play my roms. Well, I got a 3DS flash cart today and i put a ds game rom (castlevania) and a 3ds game rom (Majora's mask) on my 16 gb sd and the DS game boots fine, but the 3ds game won't do anything at all ( I downloaded a different copy to just make sure it wasn't the rom and I am putting the .3ds file on the card not the RAR file.) My 3ds is at firmware 7.2.0 and I downloaded the kernal from the R4 website, but if I need to get a firmware update or something just let me know. I don't care about emulation or anything I just want to play zelda lol Thanks in advance for the help.