News from the Blog of this Nintendo DS Emu for Windows:
While working on fixing some things in Dualis I decided to try to add some CompactFlash emulation capability to DeSmuME. After some code massaging I got file reading working, as can be seen in the screenshot below from the CF version of DSLua. I have supplied the code to the people responsible for DeSmuME so this functionality should be available in future versions.
More info --> http://dualis.1emulation.com/blog/