I just purchased my first r4 card for my nintendo ds. I use the old blocky ds (bought it as soon as it came out) if that matters. The r4 card I bought was from dinodirect. It's called R4I-SDHC Upgrade Revolution Multimedia Flash Card for NDSi NDS DS Lite if anyone wants to search for it. I would post a link but can't yet . I have a 4 GB SanDisk microSDHC card that I am trying to use with it. I think I bought it from bestbuy. Anyways, I have no idea what to install on my micro sd card to get games on it to work. The micro SD card has absolutely nothing installed on it right now. I have tried downloading the kernel (not sure if it was the right one for my card or not) but when I put the r4 into my ds, the ds says there is no DS Card inserted. Sorry if this post is really confusing but I wasn't really sure how to word everything :P. Thanks for any help :)!