1. Go to the downloads page, where you will find links to the current installers for Windows and Mac computers.
2. Download the relevant install package to a suitable location (Probably your desktop).
3. Execute the installer. This will guide you through the rest of the process, creating any necessary folders and files on your system.

Because REALbasic is free on Linux, there is not currently a compiled version for Linux. In order to install OpenSong you need Compile from the source manually.

1. download and install REALbasic and the current source for OpenSong. - Compile the source, placing it in a suitable location.
2. The First time you run OpenSong it will create the necessary folders and settings files, you will need to add the song files and backgrounds manually to the correct folders.