We all know that most operating systems these days come in DVD format, but how many of us run installations of our operating systems off an SD card? Macworld Senior Editor Roman Loyola has gone ahead by posting a video guide that details out how one is able to install Apple’s OS X Leopard on an SD card. After all, the new line of Macbook Pros (except for the 17″ model) is equipped with the said memory card slot, allowing you to install applications from it or even boot straight from the card itself. Just make sure it has at least 8GB of storage space within. Unfortunately, you can’t boot a PC with this card.