Install the WP SEO plugin – http://yoast.com/wordpress/seo/
Having a dedicated IP address for each of your web site will not help with search engine rankings (this has been confirmed by Google).
Read some of the articles on yoast.com and other web sites.
Thank you for your feedback. So you mean it doesn’t hurt anything even though all those domains have the same ip? At this moment, I linked all these websites together, according to what I read before, in bound links don’t count if they come from the same ip.
I bought those domain name from somebody else.