I just started to follow a tut in the WinC Wiki about making a start menu. It says to create an image of the start menu and then divide it up into 5 pieces. The pic there shows guide lines that divide it into 8 pieces. The explaination of what the pieces are is not very clear.

How should I divide it?
When I create images from the pieces, should the canvas size be only the size of the piece or should it be the size on the start menu?
I'm sure I'll have many more questions later....