One of the chapters of our collective book (Adell and Martinez eds. 2004 ¿Dónde están las llaves? Madrid: La Catarata) deals seriously with the analysis of media coverage of squatting in Spain through the newspaper El País. For those who can read Spanish, the reference is:
Author: Javier Alcalde Villacampa
Title: LA BATALLA DE LOS MEDIOS: LA DEFINICIÓN DE LA PROBLEMÁTICA OKUPA EN LOS MEDIOS DE COMUNICACIÓN DE MASAS*
Pages: 227-266
http://www.catarata.org/libro/mostrar/id/205
Google Books has scanned part of the book, so you can have a look:
http://books.google.es/books?id=4cEozFIcYssC&printsec=frontcover&dq=adell+martinez+donde+est%C3%A1n+las+llaves&source=bl&ots=ZKeSj0ZeAk&sig=XY-zkXpQ8pSoCnEO_atzYGZJi_E&hl=es&ei=dHf6S9nWIpfc_Qab1PjgCg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBUQ6AEwAA#v=onepage&q&f=false
and the link to the DOC file of the chapter:
http://www.mediafire.com/?dijlm0qmrjy