I’ve used the above plugin to do exactly what your after, recently too. It worked. But careful though, its very powerful.
I work 4 an SEO agency and I utilise the Headspace plugin to achieve what your after. http://ww.wp.xz.cn/extend/plugins/headspace2/
Its not perfect and has it limitations, but should be fine for a small to medium sized relatively uncomplex site. It will probably solve your meta issues as well.
