i know how to install nvidia drivers on a bt5 or linux os that is installed to a hard disk. however, i don't know how to do that to a live usb installation and make it stick. even persistent usb installs do not allow permanent driver changes. the how-to on nvidia drivers specifically indicates that it is a video driver install to a HARD DISK installation of bt5. is there any faq for udating drivers for a usb install?