OK, I am a total noob here. I bought this R4 dual-core card and cannot find the proper firmware to get it to boot. I keep getting errors when trying to load retail DS games. Using R4i-V4.0b English firmware as directed. I never had this problem with my old R4i v.5.0 3DS card years back, it simply stopped working (timebomb?) Any help with a link to the proper firmware would be helpful, I'm old and getting weary of wasting hours of my time, I just wanna play!