I just followed the instructions from http://jeff.doozan.com/debian/ by copying his installation script to a local tmp directory:
cd /tmp
wget http://jeff.doozan.com/debian/dockstar.debian-squeeze.sh
chmod +x dockstar.debian-squeeze.sh
export PATH=$PATH:/usr/sbin:/sbin
./dockstar.debian-squeeze.sh
after this the system is gathering stuff from the internet and is installing it on the attached USB stick. And it succeeded with a newly running debian squeeeze on my dockstar