However for some reasons, all of my games name have the last letter missing.

I have an issue with the megadrive, the roms plays fine but impossible to loads the artwork. The snes works perfect, and I have downloaded the art work from the downloader so everything looks nice. I previously posted here because roms wouldn't show up, I have finally sorted that out but it took me ages. I'm a complete newbie who recently got an hard modded xbox and try to adjust the settings of XBMC emustation.