i had the jenises emulator in it. one day it froze out of nowhere, and i didnt pick up my DS for a couple days (i had a psp). but when i open the folder up in my R4, it displayed the rom that i played last and froze, and this other thing i cant even describe, its this..thing with 2 lines like || (like the pause sign on a remote) and thats all. it says i cant load it, and it wont even let me go back to the main menu without turning off the power. on my pc, there is nothing at all in the folder, bet it still says its 16 mb full. and i can't even delete it, so i guess i will format it now. anyone know about this?