Well I did try but unfortunately I'm stumped. I'm not familiar with Teensyduino at all, don't have any of those boards and only installed once to help someone with an easy issue. The problem is the tool name is not being defined. It should be filled in at the end of the path: "C:\Users\Bo\Desktop\Arduino IDE\arduino-1.6.8\hardware\teensy/../tools/" in the commands. Now that you've provided a decent amount of information hopefully it will help someone more knowledgeable to help out. If you wait a while and no help appears here you could try the reprap or teensyduino forums. Cross posting is not usually a good idea so please only post to one at a time and provide the link this thread as well as the error message and the link to the installation instructions so that nobody will duplicate effort trying to provide an answer when it was already done on the other thread.