Not sure I quite understand the point of modding two Powerbooks into a snowboard, but I admire the energy behind the project. Very rough translation via YouTube:
"Two old laptops lying around... Old laptops, a few screws, a snowboard connection and rock 'n' rolling, my new snowboard was born!"
According to Engadget, the project was done for a "competition asking for creative ways to re-utilize old gear." Check out the second video in the gallery below to view another entry for the competition: laptop heated slippers (even weirder, even less useful).