DSTwo. You only need to copy and replace system11.dat and system1.dat. I don't know why they made a complete package out of this. You just need to replace this two files on your mSD card, and you're done.
R4iDSN 3D. I had three game icons on three different R4iDSN 3D that worked on 1.4.2: Miami Nights, Spongebob and Chessmaster. Spongebob is still working, the older two are not working anymore. So if you have Spongebob, you can update your DSi obviously. If not, you should get Spongebob first.
This post has been edited by Clookster, Thu, June 30th, 2011 at 12:44