Well, this started both with my dead xbox and dremeling it in half and when I recently took my ibook apart to take the thermal pad off and replace it with thermal paste (Funny, I thought it would have thermal paste already). Well this failed because I didn't tighten the heat sink on enough with the two adjustable screws. Long story short, I haven't been able to get it back apart to fix it as I lost my key key O_o. I then just had a brilliant idea of using the xbox heatsinks to add cooling and since they already had sticky thermal paste on the bottom, I figured, why not, my laptop sits on my desk all the time anyways. <------ Special note to that, if you plan to be using your laptop other than on a desk most of the time, I would recommend you get a commercial cooling pad or the such that has fans in it and plugs into your usb port. This is just simply a quick and easy mod that's easily removable in the event that you need to move your laptop or go somewhere with it.
Step 1: What You Need
Well of course it will help to have your savored ibook or macbook which ever, it should work on both I'm hoping. And most likely and large to medium and a small heatsink will work, I wouldn't recommend using thermalpaste, like the regular stuff as it is too messy, if you have to use sticky tack it works fine.
Step 2: Let's Get Started
Now, I am not responsible for anything you might do to your ibook or yourself. You shouldn't be able to mess anything up but MAKE a mess. To start, I'm using my ibook as an example. Start by removing the keyboard, there is two tabs at the top left and right corner of the keyboard. You may also have to "unlock" the keyboard using a small flat screwdriver and using it on the small screw beside the num lock button.
Step 3: Clearing the Area of "crud" Erm Contaminants
Now, I don't know about you folks, I don't use the actual keyboard on my ibook much, I have an external one for that, but even still there is a lot of crap like dust, hair crumbs that get not only between the keys but right underneath it. Take the time to clear it out with your finger(s) (depending how many you have :-P ) or vacuum it out. You defiantly do not want stuff like that interfering with heat transfer. As you see below, there is a space between the plastic case and the airport "extreme" (I never believed in the whole "extreme" business). This is where on the inside, the cpu's heat sink lies. Now if you've ever had one of these apart to replace the hard drive, you'll know that there's more metal in a knife and a fork put together than in the heatsink, I'm rather disappointed with apple. Even my Toshiba satellite 2520cds (old old computer) has a bigger heat sink for it's ENORMOUS k6. Adding a heat sink on the outside will help somewhat to at least dissipate heat from the case as if you feel that area when it's on, especially if it's been on all day and night, it will actually heat up enough to burn you or enough that you can't hold on. On top of the airport card, it also gets relatively hot due to the ram chip(s) directly below it. You don't have to do that step, but I did just for shits and giggles and because those cards are EXPENSIVE.
Step 4: Now for What Seems to Be the Quickest Part of the Job ;-)
Well, let's cut to the chase shall we? If you have a smaller heat sink, you can start by attaching it onto the airport card. Be firm and hold it on for a few seconds, but be gentle. The next step is adding what is defiantly going to help cool it. Press down on it a bit more firm than last time, but again being gentle with it aswell. Make sure they are stuck on there and that's about all you have to do.
Step 5: Final Thoughts
You will notice that after about 10 minutes, the heat sinks will be very warm, if not hot. This is a good sign that it is working well. If you use a external display, an idea would be to use a heat sink/fan combination and power it off the usb port. But being as I DO use my screen, I'm leaving it like this. I did also notice that my fan doesn't come on nearly as much as it did. Enjoy, and try not to make a mess with thermal paste. If you need to clean it off, wait till it's cooled down, and use rubbing alchohol. Also, can someone tell me how the hell you add the notes to the picture in mac os x? It just keeps wanting to drag the picture out of the window. I even downloaded firefox to try.