A fix is available for the Galaxy Eagle i to allow it to run on DSi firmware 1.4.1
A link to the fix is available here:
http://gbatemp.net/t259235-current-flashcards-working-with-dsi-1-4-1
There's also quite a bit of information about the Galaxy Eagle i and how to use it here:
http://gbatemp.net/t192775-my-galaxy-eagle-i-review