Format your MicroSD card with the Panasonic SD formatter if you have not done so already. The windows formatter is not meant for MicroSD.
http://filetrip.net/file.php?id=6027
Then, download the latest akAIO (1.6 RC2) here
http://normmatt.com/forum/download/file.php?id=75
Extract the RAR, and inside yous should find akmenu4.nds, and a folder "_aio"
Put both the "akmenu4.nds" and "_aio" folders onto the MicroSD.
Wait for the copying to finish, then eject the microSD and put it in your Acekard.
Would help to know what Acekard you bought, and whether or not it has a chip sticking out from the sticker.
If you got an Acekard 2.1, it may not work correctly, as there is a problem with them currently. If it is a clone, you will get a message stating so.
To put games, create a "Games" folder on the MicroSD, and put them in there. You will have to find said games on your own.
EDIT: Damn me and my slow typing