We have an oscommerce shopping cart with over 1,000 indexed pages on google since 2006. We are switching to cs-cart which is finished construction under sub-directory and will soon be moved over to root. We need SEO expert to edit htaccess and make proper error pages redirect to homepage, edit to allow robots and indexing, etc. CS-cart will generate google sitemap and I will make sure of this. All oscommerce url format will be different from new cs-cart urls. So all indexed urls on google will be broken so we need all broken links to be redirected to homepage. We need an SEO expert to make sure everything is in place so we won't lose pagerank. Please bid only if you have a great deal of experience with google pagerank and SEO.