Insert meta tag tool/script

Hi Im looking for a little tool or script that will allow me to search multiple html files in one time that are stored locally on my computer. It should then check each page for the first paragraph heading(in bold) and pick that as a title for the page. It should automatically insert the metatags for this page and all the other pages. So the title will be used for the title page and also be used for the keywords and description metatag.