u know at the edge website there is a r4cce download? u can download it from there or... google r4cce
once u got it, extracted it, and double click it.
U might want to drag the cheat.dat onto the r4cce.exe just to edit the cheatlist on the way.
Anyway, scroll down to whatever game u want or in this case, u just want to see the game id, so right click and select add new game.
click on the ... next to Dup?
after u click on the '...' button, u can open a nds rom, so just go and find ur rom and double click it, and in the boxes game->[][]