Nvidia 9200m GE overclock?

Overclocking your card won't give you much of a performance boost since it is not a gaming card .

And OCing will increase power consumption which will reduce the battery life.

Well you can try for playing Waw at high settings. But permanent OC won't be a good idea.

Well, I overclocked my 9200M GS, don't know what the difference is between GE and GS, by 30% so if your expecting 30FPS on high then you should already be getting ~23FPS on high at stock clocks  

With laptops, you just gotta be careful about overheating, since they don't have the cooling systems that desktops do.