You may also try the 1.19 version from www.r4team.com
This supports even the newer games, 1.18 doesn't
Only downside is that the reset doesn't work, makes your DS hang up
R4SDHC works fine with also 8 GB
Whatever might happen above 4 GB is that it will slow down, the workaround for that issue is making an extra directory (and limit the files in it to 4 GB)
@Xdqwerty, to answer your question, they're a fusion Brit-pop/J-pop/electronic band with a woman vocalist. Flamingo is hands down their best known song but they've got a ton of other really good songs