Is it possible to arrange a page with text, then a photograph below, then more text, then another image?

Not easily, the text section can't be mixed with the image section. Web sites generated by WIT follow rules which apply to all pages (sometimes hundreds of them).

However you can :
- split your pages in smaller ones,
- display the image section before the text section (structure template in expert mode), and make the image section float left, so the text will flood at the right part of the screen and under the text group (style template, ImageGroup CSS properties). See the hitchcock-en.wit sample (first page, and templates values).
- you may apply the trick described in the next page.