I tried it yesterday but unfortunately it didn't work, but I think the main reason is because I only had a 4GB SD card to test with, and 90% of the people say that it doesn't work with 4GB cards. And mine is also a SDHC card. You need the card to use the software, like the backup loader, on the Wii.

But I didn't give up, tried to fool the Wii. I formatted it to FAT16 with only 2GB free and 2GB of unallocated space, and Windows only showed the card as 2GB card. But again the Wii said that this card cannot be used.

Then I copied 3GB dummy files onto the card, thus shrinking the size, to fool it that way, but also that didn't work.

So today Oz brought me an SD card, but he only had one spare of 256MB. So now I don't know if the files that are copied on the card will fit, I think it's a bit more than 256MB. Anyway, I ordered two 2GB cards, I only have to wait until they arrive.