Use GC memory card in Wii game?

I'm trying to play Fire Emblem: Radiant Dawn, which should automatically read a memory card with Fire Emblem: Path of Radiance data upon starting a new game, but I can't find a way for Dolphin to read the GC memory file while emulating a Wii game. Is there a way to have it access the memory card so the game will recognize it? I'm using 4.0.1 on Windows x64.