No, not all files are acceptable. I think there's a setup script, but it's really simple and you can go into the config.php file and define the file types you want it to check. One other thing I thought was cool was that there's a field for the user to name or rename the file. But if I could set it up, it's pretty easy. The docs on the site are good explaining everything, though once I figured out what it did, I did the download and install without needing them. I just can't remember the details now:)