YopYop has posted this news about his Nintendo DS Emulator for Windows:

Here's some wip screen shots of new tools added to the next version
Text background are quite well supported (16, 256, ext pal ...)
And corrected BL instruction in thumb mode
WIP version without the new 2D engine
Drop a message on the forum if you find a bug in the tools.

More info at his site here --> http://yopyop156.ifrance.com/