Since you're here, and presumably have access to other computers, there should be no problem. Download unetbootin to any computer at all, attach the USB flash drive to it, and have it install the distro of your choice to the flash drive. Boot the netbook from that flash drive, and install Linux to the netbook. Debian has a network install that takes about half a gigabyte, and will download all the required files during the install. Many other distros will do something similar.