http://infabo.net/linux/ubuntu/how-i-got-my-hp-scanjet-5100c-working-under-ubuntu.html
apt-get install build-essential patch linux-headers-`uname -r`
wget http://penguin-breeder.org/kernel/download/ppscsi-beta2-20060424.tar.gz
wget http://infabo.net/wp-content/uploads/2010/01/ppscsi.patch.tar.gz
tar -xzf ppscsi-beta2-20060424.tar.gz
tar -xzf ppscsi.patch.tar.gz
mv ppscsi.patch ppscsi-beta2
cd ppscsi-beta2
patch -p1 < ppscsi.patch
make
cp ppscsi.ko epst.ko /lib/modules/`uname -r`/kernel/drivers/parport
depmod -a
modprobe ppscsi
modprobe epst