Step 1 Assume your touch-typing skills are infallible and type the following, ommitting a crucial hyphen

Step 2 Don't bother checking what you've typed and ignore legit warnings because you're [ distracted | on another pc | drunk | falling asleep ]

Step 3 Come back some time later to find dom0 proudly anouncing that it has done exactly what you asked it to ...

Et voila! Now you too can waste hours re-installing your templates!