Update Ubuntu PXE files

Update pxe configuration
wget http://installit.googlecode.com/hg/preseed/preseed.squeeze.amd64.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.squeeze.amd64.conf
wget http://installit.googlecode.com/hg/preseed/preseed.wheezy.amd64.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.wheezy.amd64.conf
wget http://installit.googlecode.com/hg/preseed/preseed.precise.i386.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.precise.i386.conf
wget http://installit.googlecode.com/hg/preseed/preseed.precise.amd64.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.precise.amd64.conf
wget http://installit.googlecode.com/hg/preseed/preseed.quantal.i386.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.quantal.i386.conf
wget http://installit.googlecode.com/hg/preseed/preseed.quantal.amd64.conf -O /var/lib/tftpboot/pxelinux.cfg/preseed.quantal.amd64.conf

vi /var/lib/tftpboot/pxelinux.cfg/default
MENU SEPARATOR
MENU BEGIN
MENU TITLE + Preseed
MENU INCLUDE pxelinux.cfg/preseed.oneiric.i386.conf
MENU INCLUDE pxelinux.cfg/preseed.oneiric.amd64.conf
MENU INCLUDE pxelinux.cfg/preseed.precise.i386.conf
MENU INCLUDE pxelinux.cfg/preseed.precise.amd64.conf
MENU INCLUDE pxelinux.cfg/preseed.quantal.i386.conf
MENU INCLUDE pxelinux.cfg/preseed.quantal.amd64.conf

MENU SEPARATOR
LABEL Back
MENU EXIT
MENU END