Upgrading from LTSP 4.2
there are some differences between LTSP 4.2 and the LTSP5 implementation in debian.
you may want to move your LTSP 4.2 installs aside to /opt/ltsp-4.2 so that you can easily switch back if needed.
there is no lts.conf by default. it is only needed if you need to change defaults.
LOCAL_STORAGE has been renamed LOCALDEV
configuring by hostname is broken due to http://bugs.debian.org/406366
SCREEN_01 through SCREEN_06 should not be used, unless conflicting entries in /opt/ltsp/ARCH/etc/inittab are disabled.
drives are now mounted at /media/USERNAME