Dolphin Support for SD DLC

[Veritas52]

I've been hacking away at this problem for quite some time on my own now, so I figure it's time to fold and ask for the help of those who know more than me. What I'm wondering is if Dolphin can use dlc from an sd card. I have some Rock Band 3 Wii content on an sd card, but I would rather emulate the game because I have an Xbox band kit hooked up to my pc. I noticed Dolphin creates an image of an SD card. I tried opening it with WinImage and shoving the private folder in there, but the image was too small. So what do you guys think, is this possible?