1. Start a text editor (such as Notepad).
2. Open the SRC file (Image.src by default).
3. Edit the file as required, keeping in mind that you may have to type in many of the keynames. (Note that comment lines should start with a semi colon.)
4. Save the file.
5. Quit the text editor.
6. Save and compile the SRC file. (For details, see Compiling a CFG file.)