I think it is possible, but I tried to design DiiLC as a simple application that could grab three regional DLC simultaneously (if all of them are available on the server, so I dont need to choose, just grab all of them). And the savegame file could only have Pete to deliver one letter/present at a given point of time. Furthermore, even for one region, there are choices of different languages in the letter data. I will check more on this when time is permitted.

But I did it for HDLC because it had never been done before (AFAIK), and just for a laugh among wiibrew users that we could employ Pete to deliver HDLC (not just DLC).