I installed the quickstart 3.0 package one month ago, and as I said at the time, the sample data did not install unless choosing the option "simple homepage" (which is not complete).
I can not download the package anymore with my link.

Ok, I figured it out.
You have to install the package in english (GB).

By the way, the slideshow is still not working.

Dear Jean-Christophe Ducoin,

Maybe it conflicted js. Could you please upload code to your host? We will check directly.
Or, you can try to choose 'No' in 'Include Jquery' field (Extensions->Module Manager->Edit your slideshow module->Options).

Thanks