Neoflash have released the software for the soon to be released Snes Flash Cart and the already released N64 Cart, heres the release details:

The MD/N64/SNES Myth flash cart PC programmer V2.99 [Jan.30 2010]

* Finish the SFC/SNES function 100%
* Support multi SFC/SNES games, and select game on TV
* Support all SFC/SNES save type
* Support all SFC/SNES games (of cause, some special games need the DSP game cart support)
* Use use any SFC/SNES cart to boot
* Support action replay function (but the GUI not ready yet)
* Support backup/restore save data to PC
* Fix the 256M PSRAM support for N64 games