Well actually if you go there - it looks like you got it installed.
Those may be false errors, but the forum seems ready to use if you go there.
You might need a full URL to your stylesheets to get started. But delete the install.php and createtable.php script then click on new user.
Once you are logged in you can try adjusting the stylesheet URL. Likewise the image URL is wrong (right click on a broken image to see what it's trying to use).
