Actually, it wasn't really that bad, the processor used to live around 55°C, but I would be happier to maintaint it about 10° less. So I searched at my "studio" (you can call it a lab) and found some cheap things that I used for this little cooling device.
Here are the elements:
Step 1: Pop-in the Cooler in the Case
The cooler's size is just standard and the black case is sold in Wal Mart Argentina, but considering this things comes from China, you may find the very same case in Wal Marts all over the world.
Step 2: Adding a Power Source
Fortunately, HP power supplyes are very safe and in case of shortcut or something wrong they automatically shut down until you unplug it.
Step 3: So This Would Be the Final Result
And that's it! From the moment I decided to do this and started looking for materials, to the moment I finished and tried it, it was about 10 minutes.
I know is not a great invention, but works and does what is supposed to :) hope you like it and again I'm sorry about my english!!