Well, it may be a JoomlaHacks installation, but those look to me like good old fashioned permissions problems. Sometimes you need to open the files that are throwing the errors (rdf.php, for example) and see what files they're trying to open. Generally speaking, all of your web files need to world readable, and a lot of the files need to be writeable during the installation.
But if that doesn't fix it, I second the motion. Go to the
JoomlaHacks [nofollow] site where they seem to know how to make all this stuff work. Thanks to them I now have a working bridge (I never got it to work with the other one). There is a good installation guide on their site, but it's not responding right now so I can't post a link for you. It's on the front page, though.
