PHP, MySQL and XML for IPodCasting

Hi, I´ve got a web project that daily offers 4 o 5 mp3 files recorded by me. From an web based interface I populate a database with titles, descripcion, images and the path for the mp3 file in the server The cuestion is I would like to offer the content for Ipod, using ipodcasting. Then I have to produce a daily XML file in order the Ipods feed from that file.... How to proceed.... Should I create a script to make the well-formed XML file? (echoing to a file based into a template that I´ve got) or is there parser of something like that? which can help me to produce that file.... The scenario would be PHP 5, MySQL 5.x and Apache 2.0 Thank you in advance Rgards