maybe you could make something like this to accompany reggie!. Although this just modifies savedata (which is probably due to all that legal crap on wiibrew)
http://wiibrew.org/wiki/User:Conanac/DiiLC
quote from page:
If you could make something like that that patches directly into a wbfs drive (and backs up level data), that could be a good way of applying or removing level hacks.
plus, maybe you could make a loader that would patch the game before booting it- i.e. shows hack names, select one, patches regular level data, patches hacked level data, boots game.
http://wiibrew.org/wiki/User:Conanac/DiiLC
quote from page:
QUOTE said:DiiLC is a simple application to download and insert the DLC (downloadable content) or HDLC (hacked downloadable content) into Animal Crossing City Folk savegame file (use Waninkoko's savegame extractor for extracting savegame file). This application searches the DLC and HDLC files from the distributing servers. It could download and insert three DLCs (for US, EU, and JP regions) and one HDLC that are available at the time when the application is running.
If you could make something like that that patches directly into a wbfs drive (and backs up level data), that could be a good way of applying or removing level hacks.
plus, maybe you could make a loader that would patch the game before booting it- i.e. shows hack names, select one, patches regular level data, patches hacked level data, boots game.