technically although itd be easier and take less time to make you world again as youd have to have to coding languages connect to eachother which im unsure about then theres the whole how would the player item interact with the version cause the most recent ver . 1.4.4 us different then the most...
@Xdqwerty, You do realise that just about any SD card formatted to FAT32 should work with the DSi. I think, 16GB or 32 is about enough to load all of your games.