Parris50,
The short version of that description is fold both axis in half. Then horiz and vert segments in half and half again until you have 7 vert folds and 4 horiz folds.
Then simply fold the horiz edges to the centre so the edges meet in the middle. Zigzag the vert folds to a concentina (sp?) and then fold in half again.
You end up with a road atlas type fold than you can easily unfold to be like a book.
Horiz = long edge.