Features:
Basic emulation (with sound) of NES roms.
Fast forward/rewindInstallation:
Patch nesDS.nds with DLDI if your card needs it
Copy nesDS.nds to the 'apps' folder of your card
Create a folder called 'nes' in the root of your card
Put your legaly held .NES files in that folder
Run nesDS from the Apps menu of your card

Images