Xml trough Static FBML

I dont know if its possible but I need to create a Facebook Tab on my facebook FAN PAGE that feeds from an XML file hosted on my server. The main question is that there are 5 diferents XML files, each XML must display the info in a different way into de TAB. I really dont know if this can be do on a simply static FBML Tab o it must be do as an app and then create a tab on my Page for this app. So i need someone that knwos the answer and how to do it and pay for doing it as soon as possible. Waiting for an answer.