Hi, I've been reading a lot about R4 DS + 4GB MicroSD cards.. here's my question : Is there a difference between 4GB MicroSD and MicroSDHC? Does 4GB MicroSDHC work with R4DS? If not, do they even make 4GB that's NOT MicroSDHC? I can't find any. Basically I want a 4GB card for my R4DS. Can anyone tell me if they've had any luck getting any to work with theirs? Thanks for your help!