What about SE-10 PIR Sensor

Dear all,

I'm thinking about using SE-10 PIR motion sensor. Is it really simple to put up as seen here?
http://itp.nyu.edu/physcomp/sensors/Reports/PIRMotionSensor

Is it possible to make a case to reduce the sensing angle of the PIR? Can I make long cable out of arduino to PIR without any problem?

Regards.