My Asus P5Q Pro refused to boot Vista setup from exFAT formatted stick. So it's not the way at the moment. As to speed: all usb sticks copy big files fast, but small one very slow. The good way i think is to reach the goal in another way: 1. Create iso image on usb-stick, copy it after boot from usb to hdd, mount to virtual cd-rom with letter Z: and run setup from it (of cource boot.ini shoul be edited to run virtual cd after reboot - this is '-') 2. Create archive on usb-stick, which will be copied on any partition and unpacked there, after runing setup there should be no problems. So what do you think? My opinion that second way will be easier to get working and faster.