Lee Firth wrote a tutorial for Creating custom toolbars in Power CMS Builder:
http://www.webassist.com/tutorials/Adding-A-Custom-Toolbar-to-PowerCMS
to use the SEO Feature in Power CMS, Create content areas named:
meta-title
meta-kewords
meta-description
uses those content ares in the corresponding tags for your page. and in the CMS Admin, there will be a link to manage the SEO content areas.