Free underclocking program?

[macindev]

Hi,
Lots of times I use my MacBook for downloading a file or sharing internet, so I was wondering if anyone knew of any FREE underclocking program? I ask this because when it's downloading I don't want heat to build in the closed case.

I have checked out CoolBook, but I don't want to spend any money on it unless I find that I really would like/use it.
:apple:

[NewMacbookPlz]

I think the computer will automatically downclock the CPU when it's not using it much.

I was downloading for 2 days straight at 1.5MBps and there was not much heat on the computer's underside. The heat came when it was time to un-rar everything...heh

Alternatively, you can just bump the fan speeds up with SMC Controller, but again...the computer will turn them up if needed.

[alphaod]

You could run the computer without the battery; of course the risk would be your computer would die in a power loss.

[iLog.Genius]

I don't think downloading excessively will produce a lot a heat. I download multiple files at the same time with very little change in temperatures. Like NewMacBook stated, I think the CPU does underclock itself when it is not in use to save power.