To do this in Freeway Pro:
- Open the Styles and Colors palette
- Double click on the Ay icon
- Click the + at the bottom left of the Edit Styles dialog that appears
- Type "pre" without quotes in the Tag field
- Add a color to the style too, this needs to be done to force the style to work
- Click Ok
- Select the text you want to be preformatted and click the "pre" style you just created in the Styles and Colors palette