hi mecha,
Q: Do I need Yasu's r4bugfix2? Will it work on an R4 SDHC with the 1.25 kernel?
Not sure. didnt work for me. and i'm still looking for a solution to this.
to get R4 Custom, go to Yasu's page http://home.usay.jp/pc/etc/nds/, do a ctrl-f and look for r4custom, its a link under...