The php-package is a new file format for web developers and customers. With this format you can distribute any kind of software, formerly written in PHP, like one setup.exe file. You simply offer one .phx.php file and that´s all. The customer has to upload it and call it through the browser once. After this, the whole package installs itself.
You can set a lot of options for the package during generation.
The whole documentation of the current php-package you can find at www.ipunkt.biz