Terribly difficult to explain in words, supernova - but once you're close, you shouldn't be watching the 'needles' much at all, you should be looking at the runway - the whole of it, not just the threshold.
And, as I said, the rudder is the wrong control to use. The air is a fluid medium, an aeroplane MUST bank to turn - if you apply rudder when an aeroplane is level, it will simply 'skid' (fly sideways as well as forward) and you'll lose all sense of direction. Leave the rudder out of it and try just gentle banking - and don't forget that the 737 is a big aeroplane, it takes time to respond, give it time, and also anticipate.
Re-reading your earlier post, sounds as if you're using the keys, not a joystick, too. Personally I never got the hang of that. If that IS what you are using, my hunch is that a joystick - no need to go nuts on 'force-feedback' at first, twenty-buck two-axis ones are fine to start with - would solve 90% of your problem.
I agree. That was my first thought as well. You need a joystick or even better, yoke and pedals.
The keyboard offers absolutely nothing as far as realism in flight. Landing an airplane, especially something as high performance as a 737 takes many quick, and fluid control movements. The problem with using the keyboard is that it moves a control surface (slowly) and then requires you to move in the oposite direction until the control is even reset back to neutral. This takes considerable time...precious time. In order to land an airplane, especially the jets, you must stay ahead of the airplane. The keyboard function just does not make that possible.
If you ever watch a pilot land a plane from the cockpit, you can watch his control movements just by looking at the movement of the yoke. The yoke is CONSTANTLY moving in sudden, and rather large movements. An aircraft set up for approach acts very "mushy". The aircraft will not appear to be moving in ways as drastic as the movement seen on the yoke. My point is, a pilots hands are rather busy on the controls and it takes a significant amount of control to keep a plane as stable on approach as it needs to be. This is just not possible with the keyboard.