Things You'll Need:
Micro sd card
Acekard 2i software
1. Before continuing it is suggested you format your micro SD/SDHC card in your computer by using your card reader or the USB adapter.
How will you format? After Windows has added the SD card as a new drive, open the "My Computer" window and right click on the new removable drive. Then select "Format" from the menu. In the format window select FAT32 as file system> choose quick format and press OK to format the card.
2.If you have important data on the Micro SD/SDHC card make sure you save the data somewhere else before you complete this step. You may also find it useful to give you micro SD/SDHC card a volume label when formatting. This makes it easier to identify your card.
3.Please go this official acekard website: http://www.acekard.com/download.php > click "download" and download version 4.21 on your desktop/mac. If the kernel has been updated on acekard.com use new kernel.
You will need winrar/ zip program to download and unzip this software and if you dont have this program on your pc already you can get it free at http://www.download.com/, just type in rar/zip on the site's search bar.
4.After downloading , extract the RAR file using winrar/zip program (double click on it), this will give you "_ak2", "akmenu4.nds" and "release_note.txt". Highlight all of these and send to or transfer or drag & drop or copy and paste to the root directory (this is important) of your MicroSD/SDHC card.[The "root" of any storage media is just the first window that pops up when you open the disk drive or you can open it by going to my computer>right click>open].Finally, please check you have all of the above extracted parts on your Micro SD/SDHC card.
5.You can now eject your Micro SD/SDHC card from your computer, put it in your ak2i, and boot up ak2i in you DS/DSL/DSi. Thats it! Its really that simple!
6.If after doing the above your dsi gives an error message possibly your dsi is on 1.4 firmware. If so and to make acekard 2i work in a dsi 1.4 firmware go to all4consoles.co.uk/acekard-setup.html and follow the main as well as the red part in the bottom of the guide. The fix is easy.