This is the Linintel Version my older OSes use. Add your OS after this template, and make your OS broadcast "Scan" when the flag is clicked so that the Linintel BIOS animation will start. In the Linintel sprite, At the end of the code, there is a broadcast block so make sure that you set the broadcast block to broadcast your os to start. So when you press the flag, Linintel will scan your computer and search for a boot device and then boot into your OS. (It will also make the Intel Sound!)
This is the most popular and recommended version, along with 4.0.
