Ravinder,
The RHP zero basically stems from the cap introduced for compensation. Take the case of a simple 2 stage CMOS op-amp, when a cap is introduced between first and second stages to compensate, the transfer function will have a zero in it. This zero can be close or within the BW of your op-amp if not properly designed. What happens because of this is, that gain curve starts dropping from the first pole, you would want this to cut the unity gain before the gain curve sees a zero. Then, you would have phase at gain-cross-over frequency as less than 180. Thereby your Phase-margin is +ve. Now, if a zero shows up before the gain curve hits the gain-crossover, then the gain curve flattens because of the zero and this will be a problem for phase-margin. Now, if the zero is situated way beyond as you said, by then, at the frequency, the gain is already negative and no question of it affecting your phase-margin.
Now, coming to the method employed to eliminate it, easiest way to do it is to introduce a resistor in series with the Cc. The resistor value should be 1/gm of the second stage's driver transistor's gm. This will place the zero at infinity (ideally). if R is > 1/gm, then RHP will move to LHP then also, it is not a prob. Hope this helps.
-Ramki.