All I did to get my DS working with pirated/homebrew games was buy the r4 kit, it's so easy to do, just copy the ds firmware that comes with the kit onto the micro SD card along with a game rom, you then put the sd card into the r4 and put the r4 into your DS and that's it, you can start playing in minutes.
the great thing is that the DS actual firmware is not touched meaning you can play legit games with out issues.
Another convinient thing is the size of each rom, their small, fast to download, and you can have many many roms on just 1GB sd card, very convinient.
Now, I don't just use my R4 for game roms, I also use it for homebrew games, currently I'm playing towerdefender with the look of warcraft, very addictive game, I've also got pocket physics, it's just fun to mess around and make things.







