Joomla migration to version 1.6.3 and SEF URL and SEO patch installation required

We have a joomla website version 1.5.22. We would like this migrated to the latest version of Joomla 1.6.3. We would also like the URL's to be completely SEF friendly and also have the option to add SEO metadata to each and every menu item and article. There used to be a Joomla 1.5x SEF Patch that did this for joomla 1.5. If a working version of this can be implemented to our new joomla 1.6.3 version we would be grateful. We require this work to be completed as soon as possible. We look forward to your urgent response. Kindest regards