How to load xml into flash via php?

I have a problem and couldn't find an answer, so sorry if this is posted before.

I have 2 SWF files: first one is outputting XML files upon clicking the "Save" button and second SWF is listing and loading those XML files and upon clicking it loads the selected XML file into SWF. This is okay so far here. But I need to use web interface so that a user inside a website sees those XML list and upon clicking second SWF will load with the related XML file. I need this because I will organize those XML files with some modules inside drupal such as Organic Groups. So each user will see different lists of XML files. Any idea ? Thanks for advance,