How do you patch an NDS ROM?

I want to download Pokemon Conquest for my EDGE card (OS 2.3) for my NDS but when I press it it just says loading then a white/blank screen appears. Do i need a patch for it and if so where do i get and and what do i do with it? i haven't a clue so a step by step would be appreciated... :)

Hey beau.1. Download a Pokemon ROM (or some other game with AP)
2. Download the DS-Scene Rom Tool (Google it)
3. Extract the DS-Scene Rom Tool and run it
4. Update everything. CMP database is optional
5. Load your game
6. In the AP tab there should be a green tick
7. Go to 'Export' and export your ROM
8. If all goes well, you should have a patched ROM to play

Replying to #2

OMG.....Tnx so much!!! :D

Replying to #3

No problem.
Happy to help.