I'm running SuperCard SD on DS.phat & another SuperCard DS.Lite (MicroSD) on DS.Lite
Both firmware are 1.63
I couldn't get Snezzi 0.26 version which was posted on sourceforge to work.
So I used the Snezzi 0.25a that was linked in this topic's MAIN POST by Opium.
at
http://www.forwardcoding.com/projects/snezzids/snezzids.html
Snezzi DS v0.25a (sound version)
1. Extract "snezzi.exe" and "snezzi.gba" to a new directory. (I called mine, "SNES")
2. Find your SNES Game ROM images someplace (SNES Rom-Reader, WWW Search Engine, NNTP, IRC...etc). The extension for the SNES Game ROM images will be " .SMC " -- So if you are looking for the US version of "Darius Twin", it could be called "Darius Twin (U).smc"... another example would be "Teenage Mutant Ninja Turtles IV - Turtles in Time (U).smc" for TMNT IV.
3. Take your *.SMC image files and put them all into the "SNES" directory you created in step 1.
4. Highlight and drag (up to 18 *.SMC files at a time) over the "snezzi.exe" file.
5. A DOS window will apear and several lines will flash by for a few seconds. After the DOS box dissapears, you will notice that there are several new " .GBA " files which have been created in your "SNES" directory.
6. Create a new directory. (I created a sub-directory and called it "NDS".)
7. Copy all of those newly created " .GBA " files into your newly created "NDS" sub-directory.
STEP 8 IS FOR SuperCard USERS ONLY:
8. Rename all of the " .GBA " files to " .NDS ". -- So if your file was "Mortal Kombat (U).smc.GBA", it should now be named "Mortal Kombat 1 (U).smc.GBA.NDS" (you can call it whatever you want to call it, as long as the extension is " .NDS "... "Mortal Kombat.NDS" will work just the same). The program I use for batch-file-renaming is called, "Better File Rename" and can easily be found on Google.
9. Copy/Move the files over to your Nintendo.DS game cart and play.
I have found many many games to work with only minor graphical glitches, although, there are a handful of games that just wont work or are simply unplayable... For these games, you will know within the first few seconds of booting/playing if the game will run as desired. Your mileage will vary.
I hope someone can get good use out of this brief snezzi guide. Mods, please feel free to edit and/or post this to your guides section if desired.