doods what u have to do is use the YS menu wich is somesort of aplication,just drag ysmenu.nds to the card and run it,the ys menu is on page 2 i think,then after putting the patch or hex editing run into from the ys menu.

so:
1-patch/hez edit
2-run ys menu in the ds
3-run the game in the ys menu