Help me make an After Effects template load text from external file using script

I have an After Effects template already built. It has one text layer that is designed to be edited manually (eg, type the text into the layer when using After Effects). I wish to use After Effect's script function to load the text dynamically from an external file. (eg, a text file at c:documents/[login to view URL]) So I need someone to write the script (or copy it from somewhere on the internet), test it on the template, and make sure it all works. I have seen tutorials on the internet that explain how to do it, but I can't get it to work myself. I assume this is an easy, quick job for someone with After Effects experience. If possible, it would be even better if the script would load the text from a database source instead of a file. To finish the job, please send me the completed AE template file, plus instructions on how to do the steps you took, so I can do it myself on other templates.