KnowledgeTree Install Trouble

I’m wondering if someone was able to install the last version of
knowledge tree on dreamhost.
The installer did not work.

  1. Complains that php 5.3.6 is not recommended and than doesn’t proceed.
  2. I can force the next step of the installation (changing the url), however the installer does not allow me to change the database

I would be grateful if I could find out how to install knowledge tree manually.
Many thanks