Except the R4 kernel, you should also download some R4 Roms & R4 game, and put them to the TF card. Currently, almost all DS and DSi games can run on R4 card. How ever, no 3DS Roms can run on R4 3DS card, so we only offer R4 Roms for download.
1. Choose your favourite game below, Download R4 Rom to your computer, it is a zipped patch.
2. Unzip the patch, you can get a game file.
3. Copy the file to the root directory of the TF card.
4. Also download and install the kernel to the TF card.
R4 Rom is already installed, you can power on the console to play the game.
Youtube watch: R4 Rom installation – How to download and install R4 Roms?