I wouldn't think so, kind of a waste of money. If it's really getting too hot, prop it up somewhere so the fans can get more circulation.
thats kind of the point of Cooling Pads, they give you somewhere to put your laptop so that it will be well ventilated etc... they don't cost too much and i think, unless i am mistaken, that people on this forum would recommend having one.
Most pads pull air from the bottom of the laptop. Most laptops suck air up from the bottom. Get the fans too close and they just cancel each other out...
Now if there are no fans near the pad's fans, or just a fanless system, you might be fine...