I followed all of the directions to a t with the new firmware, but when I put in the card and select MechAssault I get the black screen error:
"An error has occurred. Press and hold the Power Button to turn the system off. Please see the Nintendo DSi operations manual for help troubleshooting."
I reformatted the sd card in hopes that it would fix the problem, and then I went through the process again with new downloads to make sure there were no problems with my original downloads. However it keeps happening, and I'm close to losing my temper.