A very simple extension to redirect your NON SEO URL's to a SEO ones.
Suppose you have done external linking to your products, categories, information pages, manufacturers before you did your SEO key wording.
All visitors who visit trough the link will still see the old index.php?route=catalog/product&product=123 type of links.
With this extension enabled, the system will automatically redirect to the correct SEO URL.
NOTE: We are not able to provide any support anymore.