I have two DS's. One is 1.4.3U DSi and 1.4.1U DSi XL. I downloaded 1.8.8 Firmware update for Ak 2i and updated it on 1.4.1U xl. However it is still not readable by 1.4.3 DSi. So what to do? I really want to install Four Swords on my XL and keep playing on Acekard. So?