this file you have sent is not a site sculptor preset.
It looks to be an already created site.
The preset manager will only work to import presets that have been exported from the preset manager.
to create a custom site sculptor layout, you need to create a dreamweaver template, then you can use that template to define the layout.
after the custom layout has been created, you can export it through the preset manager, and import it onto another computer.
see the "Creating a custom template for Site Sculptor" tutorial on the site sculptor support page: