Actually, I have been fiddling with the Arduino widgets. I also have some of the long breakable things, as in your picture, with the pointy things sticking out on each side. They fit in the Arduino holes, but I think the two wire (brown & red wires) you show might be better for connecting the wires to the widgets? 
It seems no matter what I get, or how many of them I get, I am always lacking the proper connecting device. Can one ever have too many of these things? I have some 3 & 4 wire computer fan connectors that seem to fit the pointy things, but the wire count is never right or in the correct locations? 
Not to get off topic too far, but from this thread, I have ordered (and received) some of the above IR optical gizmos and am planning to start reworking my Arduino powered train direction indication and speed calculator. The photo resistors were somewhat of a failure, at least I hope that was the failure (surely it couldn't be my code?)? These things are a lot fancier than the photo resistors anyway and they also have blinking lights which the resistors were lacking. 
I should probably start a new thread on this after I see what happens with these new devices. Will either post success and how it works (probably the most unlikely scenario here?), or will be asking for lots of HELP! Please don't go away!
