Shari,
Great question. The warning that Woocommerce pulls up is quite scary looking, but it really only indicates that the theme you’re using doesn’t have a small tag that developers can add to a theme saying it supports Woocommerce. Outside of turning off that notice, the tag serves no purpose (though it may give some more theme sales at Woo).
I don’t believe I’ve tried out Woocommerce with the theme. I would imagine it would work with one of the more typical layouts like the standard page.
Most of the “major” issues you’ll run into with Woocommerce or other large, content-driven plugins is they may be unaware of how the theme is structured HTML wise.
Typically you can add a small helper function to the theme which will insert any missing HTML above and below the Woocommerce generated elements. That typically is all that’s needed.
You might also consider looking at the Easy Digital Downloads if your friend doesn’t need to ship pictures. It’s a much more flexible shopping cart than Woocommerce. You can add the purchase buttons to any page/post via a shortcode.
If I can help out, let me know.
Thanks,
Bill