Okay, as is obvious, I am new to practically all this stuff. I constantly fly the tutorial, and am getting pretty good at it. The only question I have not been able to answer on my own concerns the phrase "capture the localizer". The tutorial instructs me to press the VOR/LOC button to arm the autopilot to intercept the localizer. I am familiar with ILS approaches, and know the pink diamonds guide you down, but what exactly does "capture the localizer" mean? What is a localizer? Where is the localizer guage? What indications are there that it has been captured" What does it have to do with the glideslope? What exactly does "most of the MCP mode button lights blank out" mean? How do I know when to press the APP button? Any explanation, in very basic terms, would be appreciated. I have RTFM, but my head hurts and this is easier, and better. TIA