When using certain USB drives as the installation medium, the debian installer
complains with:

	"No common CD-ROM drive was detected.

	You may need to laod additional CD-ROM drivers from removable media, such
	as a driver floppy. If you have such media available now, insert it, and
	continue. Otherwise, you will be given the option to manually select
	CD-ROM modules.

	Load CD-ROM drivers from removable media?"

Answer No; then you're prompted to manually specify a CD-ROM path. Say yes,
and say that no module loading is required. When prompted for the device path,
press Alt+F2 and ls /dev/ as it suggests. The installation drive is probably
the last hard drive, e.g. if you see /dev/sda and /dev/sdb, try /dev/sdb.

If you get an error about "unable to install additional packages from CD-ROM"
later in the install, choose "go back" and choose a package mirror to download