How do I use the classic thesis template? Where do I need to put the files?

[Jommelli Niccolò]

I have been trying to use the template present in
http://www.soundsorange.net/resources/classic-thesis-for-lyx/<http://wiki.lyx.org/Examples/Thesis%29:http://www.soundsorange.net/resources/classic-thesis-for-lyx/>
but I always get the message that the preamble is missing.
What should I do?
Thanks