Here's the background and layer 3 of ISO 9000 fully ripped. Features:
-you can view the sample level to see how both the BG and layer 3 are set up.
-the palette is organized and as a bonus, layer 2 uses palette 1 without affecting SMW colors.
-the BG is the least tile-consuming of the game as it uses 47 8x8 tiles. That easy.
-there are a total of 12 Map16 tiles. Again, it was very easy.
-layer 2 can be 512x512.
-layer 3 is a different story. Did manage to make that layer 3 use the last 2 GFX pages, as to prevent screwing up the SMW status bar. It uses 247 8x8 tiles.
-Both layer 2 and layer 3 have their own files required to insert.
-The last picture is a .gif with Mario running a bit on the test level.
Recommended BG scrolling: Variable for X and Y of layer 2 and none for layer 3 and Auto-Scroll Down Fast for vertical scroll, as that's how it was in the original game.