Loading dynamic extension

Hi, ive got two hard questions for you guys. 1. I'm trying to load an extension dynamically using DL(): if(!extension_loaded('gtk')){ dl('php_gtk.'.PHP_SHLIB_SUFFIX); } The problem with this is that i can't load the extension correctly since the software is running from a USBKEY. These removable medias do not necessarely always have the same drive letter and i can't ask people to copy the software on their machine since the software will write back on the key at a specific location. 2. Further more, i can't seem to find a way to know from which path or drive my usbkey is operating. There is maybe something i missed somewhere that's why im asking. Anyone ever found something about the CLI current run path in $_ENV or $_SERVER var? Mathieu Dumoulin