default:

LABEL app01
        kernel ubuntu-installer/i386/linux
        append base-installer/kernel/linux/extra-packages-2.6= tasks=minimal pkgsel/language-pack-patterns= pkgsel/install-language-support=false vga=normal initrd=ubuntu-installer/i386/initrd.gz ramdisk_size=14984 locale=en_GB console-setup/layoutcode=en_GB url=http://192.168.123.1/preseed/common.cfg netcfg/get_hostname=app01 --

preseed:

d-i debian-installer/locale string en_GB
d-i console-setup/layoutcode string en_GB
d-i netcfg/choose_interface select auto
d-i netcfg/get_hostname string unassigned-hostname
d-i netcfg/get_domain string unassigned-domain
d-i netcfg/wireless_wep string
d-i mirror/country string enter information manually
d-i mirror/protocol string http
d-i mirror/http/hostname string 192.168.123.1:3142
d-i mirror/http/directory string /ubuntu
d-i mirror/http/proxy string
d-i mirror/suite string feisty
d-i partman-auto/init_automatically_partition \
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string regular
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman-lvm/confirm boolean true
d-i partman-auto/expert_recipe string \
        boot-root :: \
                40 50 100 ext2 \
                        $primary{ } $bootable{ } \
                        method{ format } format{ } \
                        use_filesystem{ } filesystem{ ext2 } \
                        mountpoint{ /boot } \
                . \
                500 10000 1000000000 ext3 \
                        method{ format } format{ } \
                        use_filesystem{ } filesystem{ ext3 } \
                        mountpoint{ / } \
                . \
                1000 8000 16000 ext3 \
                        method{ format } format{ } \
                        use_filesystem{ } filesystem{ ext3 } \
                        mountpoint{ /var } \
                . \
                64 512 200% linux-swap \
                method{ swap } format{ } \
                .
d-i partman/confirm_write_new_label boolean true
d-i partman/choose_partition \
select Finish partitioning and write changes to disk
d-i partman/confirm boolean true
d-i clock-setup/utc boolean true
d-i time/zone string GMT
d-i apt-setup/multiverse boolean true
d-i apt-setup/universe boolean true
d-i passwd/user-fullname string Systems Operator
d-i passwd/username string sysop
d-i passwd/user-password-crypted password $1$isz0.Q2w$fnxG5cyWjk0qfwRf9/lxa0
d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean false
tasksel tasksel/first multiselect minimal
d-i pkgsel/include string openssh-server
d-i pkgsel/include string snmpd
d-i finish-install/reboot_in_progress note
xserver-xorg xserver-xorg/autodetect_monitor boolean true 
xserver-xorg xserver-xorg/config/monitor/selection-method \
select medium
xserver-xorg xserver-xorg/config/monitor/mode-list \
select 1024x768 @ 60 Hz