It (obviously) requires a copy of Burnout 3 for Xbox and the latest version of Cxbx-Reloaded. It only compiles for Windows, but runs well in Linux with Wine (use winetricks to install vcrun2019 and d3dcompiler_47). It's available here (binaries can be downloaded from the 'Actions' tab if you have a GitHub account). The good news is my launcher is pretty much ready.
