Automatic Site Map

I produce websites in static html and dynamic php with a CMS. I need someone to write a script that will sit on each website I build and produce an html and an xml site map every time a page has been changed so the the site maps are always up to date. The XML map is for Google and other search engines. In addition, I would like a small html list creating which I can place on? the site's home/index page which produces? a list of the last *ten pages? to be updated and the date that the update was carried out. The date should be displayed in the UK format of dd/mm/year.? (* this should be commented so that it's easy to change). All pages and the listing should reference? the local css file.