Why would you use Rudolph's Anti-piracy patch for this?
First, find yourself an untrimmed, completely clean ROM.
Than, download the second patch available in this topic at the front page (first page, if you prefer).
Extract all the files, and open up xdeltaUI.
In the Patch part, choose to open the file beta patchV2.xdelta
In the Source File part, choose the ROM you've got.
And the output file is where you should set and name the file resulting from the patching. Name it something along this: [name you chose].nds (Don't forget the .nds part at the end)
And there you go. You put that in your flashcard or try out an emulator.
If there's a Checksum Validation Input problem, just go find yourself another ROM.