» Sun Nov 28, 2010 4:57 pm
I think the Fallout Trilogy pack DVD has a pdf manual included. So just open the manual, then run Fallout and use alt-tab to switch between the game and the pdf manual.
There is also a help menu by pressing F1. But you probably knew that already.
The motion sensor is an item indeed, like everybody stated above: http://fallout.wikia.com/wiki/Motion_Sensor