install debian from usb stick

# wget http://http.us.debian.org/debian/dists/stable/main/installer-amd64/current/images/hd-media/boot.img.gz
# sudo umount /dev/sdb1
# zcat boot.img.gz > /dev/sdb1

plug stick out / in.

# wget http://ftp.de.debian.org/debian-cd/current/amd64/iso-cd/debian-504-amd64-netinst.iso
# mount

see where stick is mounted.

# cp debian-504-amd64-netinst.iso /media/Debian\ Inst/

happy installing!