Yes, we are aware that the site maps of Yahoo may be really different in construction as compared to the sitemaps of the Google search engine. In spite of all of this, it is very apparent that we could still benefit from these two search engines. We just have to make sure that the sites that we submit separately to these search engines have already been enhanced to fit into the profile that is deemed desirable by each SE. The Yahoo sitemaps may be a little technical in nature and this may be seen when you get up close and personal with them.