Tutorial for installation on shared webhost?+issues

I’d love to use Wagn, but I don’t succeed with its installation. I have installed countless web applications based on PHP, Python or Perl, but I have no experience with anything Ruby-related.

I managed to install Ruby on Rails (as I read that Wagn requires it), and I also managed to add a Ruby on Rails example site. But the next step (→ connecting Wagn to Ruby on Rails) doesn’t work.

Is there any tutorial out there that describes the necessary steps? I have Ruby on Rails running and installed the Wagn gem.

I’m on a shared webhoster, i.e., Linux (CentOS) + Apache.