Here's the second post, with the 'roll your own' instructions.
Open a new Page layout document based on the Blank landscape Canvas (Page Layout) template.
Click on the inspector button and choose the Document inspector (first button).
Set all four margins to 0.5"
Leave the Header and Footer checkboxes unchecked.
In the Toolbar, click on the Text Box tool to insert a text box. Click outside the box to deactivate it, then click on the box to Select it. (You'll see square white handles at each corner and in the middle of each side of the box.)
In the Inspector, click the Metrics button (ruler).
Set the box width to 4.5" and height to 7.5".
Set both X and Y positions to 0.5".
With the box still selected, press command-D to duplicate it.
The new box will be selected.
In the Metrics inspector, set the X position to 6.0" and the Y position to 0.5"
You will now have a single page with two text boxes, a half inch margin on the outside edges, and a one inch gutter between the two boxes.
in the Pages list to the left of the main window, click in the icon for the first (and only) page to select it, then press command-D to duplicate it.
Save the file
You now have a simple template for the outside and inside pages of your single fold booklet.
The page order for the booklet is:
4 | 1 (back, front)
2 | 3 (inside left, inside right).
Regards,
Barry