Supplier Product Datafeed to mySQL

Hello. I'm looking for somebody to help me out. I have an ecommerce website which runs on Zen Cart 1.3.8a,? Linux 2.6.26.5-grsec,? MySQL 5.0.51a-community. Hosted with Host Gator. My ecommerce website stocks products from a dropshipper and they provide stock datafeeds in .xls, csv and xml. I dont 100% know exactly what I need so I'm open to offers / help / advice, but my initial thoughts are a .php script which I can run from a cron job a couple of times a day, which would import a datafeed from my suppliers url, and import it (magically)! into the mySQL database for my Zen cart shop. Make sense? I hope so. I can do little bits if needed to help you as long as instructions are muppet proof and I would Ideally like a couple of files and instructions of what you have done so I could implement on other stores but thats not a requisite of this project.