How to write your own SimpleOS skin?

Simply download "source code" of the skin you want to rewrite and edit the graphics in Photoshop. When done zip the package and rename from .zip to .ipkz

(Example: look a working DefaultSkin.vga.ipkz (note .vga 640x480 and .qvga 320x240 resolution) rename it back to .zip and open to see how the structure works)