Re: laptop in trunk
What exactly are you doing with a laptop in your car??
Anyways, being a former car audio audiophobe, I used to deal with the same thing using high powered amplifiers and worried about fire hazards. I'm a bit of a wood working guy, so I'd use some tools we have in the garage to build a stand for the amp. I even ran a relay from the amp to power 4 computer case fans to cool down the amp's heat sink.
You can get pretty creative with it. For example, on my laptop I have a fan on the bottom... so if I were to install a laptop on a platform, I would use a router to ground out a channel in the baseboard to channel out the hot air exiting the laptop.
Just gotta be creative, think slow, measure twice cut once. The other advantage to making a platform is you can add some risers to the laptop stand to lift it off of the platform a bit for greater heat dissipation.
Just some food for thought... since I have no idea what your intention is, I'm just relaying what I did with car audio amplifiers... But both are power consuming hot running devices, I figured they'd be in the same ball park!!
There's no place like /home.