Just drop both of the .exe files in the same directory, run the one that corresponds to the GUI program, and click the Open ROM menu item.

Just download the package, unzip it, run the .exe, and then open the File menu and choose Open ROM. Nintendo DS screen at slightly reduced size.

Much like zipping, a RAR file compresses several files using WinRAR software. Here’s how to extract RAR docs and media on both Windows and macOS.