how to find game ID for DS roms?

I patched GTA: CW with the ARM7 and ARM9 patch but now the cheats won't show up, how do I find the "patched" ID?Side note, using Narin's Cheat database, read about some problem with R4s and 4mb+ cheat files, does that apply to this clone?

Try watching this vid:http://www.youtube.com/watch?v=L9tY7mM-VUc
It says how to find your Game ID even if your game is patched.

I use an application called "Cheat Code Editor" to find the game ID of a rom. You can probably google it. Click Tools, Get Game Id from Rom, and you will see the Game ID.

thanks for the replies guys
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AND IT WORKS!