I've had Mario Kart DS on my M3's SD card for a while but haven't really played it because it seems to lose my save game information.  
I thought I saw someone mention something about this in a post a while back.  I searched a bit about this but didn't come up with anything...? Any help?
Edit: N/M I figured out that for some reason it hadn't created a .dat save file.  I just downloaded one from dualscene.net and renamed it to match my rawm file.  It now saves!