burned it the second time using these steps with Memorex DVD+R DL dvds 2.4x
1) Open DVD burner drive.
2) Insert blank DVD+R DL.
3) Close DVD burner drive.
4) Open .ISO file with ImgBurn 2.4.0.0
5) Click on the "Change Booktype" in the bottom right.
6) Click on the appropriate tab and change DVD+R DL media to "DVD-ROM"... and you might as well do it for DVD+R and DVD+RW too while you're here.
(Note: Your burner might not be able to support this. That doesn't mean it won't work. This step is just to increase media compatibilty.)
7) Click OK.
8) Go to Tools > Settings > Write. Set layer break to "User specified" and type in 2084960.
9) Change write speed to 2.4x.
10) Click on the big button in the bottom left to start burning.
11) Don't use your computer while it's burning!
12) Wait.
13) Eject newly burned disc.
14) Insert into Wii (which should already be updated to 3.2 firmware, and 1.9g firmware for the WiiKey at this point).
15) Let the Wii update from the SSBB disc.
16) Play game after it reboots!
in the main wii menu, the game doesnt even pop up and i get an error. my first burn with default settings got me farther. anyone know any solutions?