1) Copy all files in the '/_dstwoplug/' into the same folder on the DSTwo 
2) Download the 'Duckslinger' File and Unzip it
3) Copy 'ctds.nds' file into the '/_dstweoplug/' folder
4) RENAME the file to 'DuckSlinger.nds'
Also read the 'readme.txt' that comes with the program for info about setup