This can be done. It'll better if you use Perl or python script and also you can do it by using php. First you need the rss feed url for other site, then need to scrap meta like Title, Description, Publication Date etc. and insert them to Database, csv or XML files generated inside your server. Script should run with cron or infinite loop with regular basis sleep like 1 hour or something and update data regularly. As specially perl is strong for regular expression so i'll suggest you to use perl. My Company has already developed some spiders and crawlers to scrap data from different sites. So I think i can help you to finish your job perfectly.