I have a new R4 Ultra with the proper Kernal loaded (www.r4ultra.com). I have a 'games' file with 4 .zip NDS games copied to it. When I start the DS lite I can see the menu, I can choose the games directory, I can scroll down through the games, but when I press "A" to start that game... Nothing. I am using a small 256mb Kingmax microsd card because the 4gb SanDisk micro sdhc that I bought didn't come with a USB reader and the reader I have is old and won't read the 4gb micro sdhc. (I am waiting for a new USB reader to arrive in the mail) I am actually just trying to see if this R4 works for now but am disappointed so far. This is what my R4 box says... Supports SDHC memory cards ( compatibility up to 32GB) ; Change language of menu as you want without any limit; As same size and thickness as original card; No need to flash. Build-in launch Slot-2 (gba) function; Support DMA read and no lag when using any microSD card; Support FAT16 and FAT32. Can transfer files with PC, PDA, Cellphone and Camera; Support clean rom and drag-drop to play. Fast loading; Support NDS and iDS games. Run iDS games on any version of DS; Write save files to TF card directly and no need manual backup or restore them; Auto save type detection and no need to update save type list database; Support moonshell and home brew; Power saving design. Enter optimization mode automatically; Double screen UI. Support display thumbnails of games; Easy to use and setting ; Support button and touch operation both; Support Wi-Fi and rumble package and browser expansion; Support change back ground picture of menu; Support change font color of menu; Support brightness adjust (DS Lite only); Support soft-reset; Support AR cheat code; Support soft-reset of moonshell 1.6 (back to main menu of R4 Ultra) ; Support DLDI auto-patching; Support Download play; Hope this helps you to help me!
"I have a 'games' file with 4 .zip NDS games copied to it." You have to unzip the games first before you put them on the microSD card..