source: install/copyinstaller.sh @ 26ffad7

#!/bin/bash
    CDROOT=$1
    DISC=$2
    PART=$DISC""1
    MNT="/tmp/installmnt"

    [ "$CDROOT" ] || exit 1
    [ "$DISC" ] || exit 1

    failed()
    {
        umount $MNT &>/dev/null
        
        echo "Copy of installer failed!"
        echo "Press enter to continue..."
        read
        exit 1
    }


    echo "* Copying installer to $DISC ..."

    mkdir $MNT &>/dev/null
    umount $MNT &>/dev/null

    #herpartitioneer USB stick
    SIZE=`du -s $CDROOT|cut -f1`
    (( SIZE=(SIZE*2) + 100000 ))
    echo  -e "0,$SIZE,83,*\n"|sfdisk -q -fi -uS $DISC || failed
    udevadm settle

    #ext2 filesystem partion 1
    mkfs.ext2 $PART || failed
    tune2fs -i 0 -c 0 $PART || failed

    #copy alle data erop
    mount $PART $MNT || failed
    cp -av $CDROOT/* $MNT || failed
    umount $MNT || failed
    rmdir $MNT || failed

    #installeer grub IN de partitie (niet meer in de mbr)
    touch /tmp/device.map.$$
    echo -e "device (hd0) $DISC\nroot (hd0,0)\nsetup (hd0,0)\nquit" > /tmp/grub.$$ || failed
    grub --device-map=/tmp/device.map.$$ --batch < /tmp/grub.$$ || failed
    rm /tmp/device.map.$$
    rm /tmp/grub.$$

    #voor mbr gebruiken we syslinux, deze werkt beter als die van grub. (ook op hp bakken)
    dd if=syslinuxmbr.bin of=$DISC bs=512 count=1 || failed

    #final check
    fsck.ext2 -n -f $PART || failed

    sync
    echo "OK, install disc created!"
    exit 0