In case you need clarification on my question, the flash cartridge I'm talking about is exactly this one: http://gbatemp.net/index.php?showtopic=21032 I've had it since 2004-ish, and I remember having a problem with writing games to the cartridge way back then, and I knew exactly what the problem was. When reading somewhere (I forget where, but probably their official site), they said that the write speed or something will screw up if your computer was too fast. Basically, when I'm writing and this error occurs, the progress would never finish, or the progress bar would go past the end of the file that I'm writing. I solved this problem by running something like MAME while the cart was writing, to help "slow down" what was going on by running extra applications on my PC. Now, I recently bought a Gameboy Player and want to leave this flash cartridge in it. I know it worked because I put in the flash cart into the player to see if it worked. But I've cleared the cart to put in different games. However I'm having the same problem as before. The problem is, I've since gutted my PC and have a new motherboard, processor, USB 2.0, etc. so my computer is much faster than it was those many years ago. Now, I can't slow the write process down by running extra apps, and the error keeps on happening no matter what. Can anybody think of any solutions to this problem, short of trying it from an older computer?