email me I will show you how I got read off the overheating problem, I run the games off a USB external drive.
The new Slim actually has a fail safe for overhearing. It will shut down when getting too hot. Would recommend to avoid USB exras like the Nyko Fans etc, unless it has its own power supply, so will not cause a power short. Not sure how the slim is, but the Arcade, when I had it, gave me the power short when I used the fans that ran off of the Xbox 360's power supply.