1) The author seems to make the unlikely assumption that the reader is x86_64 architecture.There is no mention of the fact that you need that architecture, or what to do otherwise.

2) Where is OpenERP even installed? Python packages are installed, the PostgreSQL is installed. Please note the title of this tutorial "Installation Of Open ERP Client, Server And Open ERP eTiny Server On CentOS 5.2."

3) There seem to be numerous mistakes throughout the tutorial. For example, I think:

   yum install postgres

 should be:

    yum install postgresql

4) Does the author assume that OpenERP is already installed? If so, why install Python and PostgreSQL?