Nothing wrong with the question wesley123, at least it proves you're thinking. The problem is removing heat from a hot object and carrying it away. Yes, a heat sink is a solution, but just not a very good one in this scenario. There's a lot of heat to be removed, and a heat sink just isn't good enough for the job.
But what do enthusiasts do with high performance computers when there's a lot of heat? Yup, you see radiators. Just like in Formula One, and the principles are exactly the same.
But on the same concept, why not use the floor, with tubes running in it, like a poolhouse solar heater, but in reverse. This puts all the coolant weight extremely low, doesn't require the bubble/skin idea (which would be pretty useless for flowing of the coolant), and lots of air rushes past the floor, and could get rid of the rads altogether?
This type of radiator is known as a surface radiator. These had a following many years ago, but they have drawbacks. Problem is, they require a large surface area, and size equates to weight. So compared to the type of radiator we see, a surface radiator would have to be much larger in area, and thus it would be huge. Additionally, mounting a surface radiator on the bottom would leave it too exposed to anything coming off the road surface. Just one pebble, or worse, a driver missing his apex and driving flat out over a curb would have just one result. Yesterday Kubica tried to turn his car into a rocket and launch over Trulli. Imagine if his whole floor had been a surface radiator? Is there a possibility Trulli could have been blasted by a stream of boiling water if the BMW had a surface radiator? Impractical, and also potentially dangerous.
Racing should be decided on the track, not the court room.