This was through the microSD Management area of the 3DS.
But since getting a new modem and getting on the NBN (Australian here), I can no longer do it.
Is there something I should be doing so I can see my 3DS on my computer network again?
So I have used this guide:
http://www.spillmonkey.com/?page_id=5
And I've just learned you can edit such things as how often passes can be obtained (apparently can be dropped from 10 minutes to 60 seconds).
Is there a guide for how you do this on gbatemp?