1. Download robocode-1.9.2.5-setup.jar
2. Run the jar (double click)
3. Click "No" when it prompts you to install to C:\robocode
4. Change directory to Z:\robocode
5. After setup, click no for start menu and no for registry
6. Go into your network directory and then the robocode folder and run the robocode.bat (The icon looks like gears)