First of all your MacBook Pro is probably hot enough as it is?? The only solution I have heard of is that you can overclock the video card in Windoz in BootCamp wth the ATI tool, load it into the video card and when you are back in OS X it will be overclocked.
I don`t think you can overclock the CPU on a MacBook Pro because it uses an EFI bios and I have not seen any overclockers software support for that.