There is something called Wii-clip.
Is not exactly a plug and play, but its not far. You can solder any chip on th wii-clip or buy a wii-clip with any presoldered chip on it.
All you have to do is to open the wii and plug it like a cup where the chip is usually soldered. The clip itself is designed to fit perfectly into the wii and once youve plugged it, you can play backups as if you have a soldered chip.
http://consolextreme.com/Shop/index.php ... ucts_id=20
There is an example of it, Im in Spain and here we have some suppliers of different wii-clip versions, with different chips.
hope your wife agrees with this XD.