If you have external CD or DVD drives that are not displayed when you select Load Disc on the Project menu it may be because they where not turned on when CDGFix 3 Super was started. Available CD and DVD drives are only scanned automatically at startup. Hence, if the external drives are turned on after CDGFix 3 Super was started they will not be automatically detected. You can force CDGFix 3 Super to re-scan drives by selecting Detect CD/DVD drives on the main Tools menu.
If re-scanning drives, or restarting CDGFix 3 Super, does not help you may continue troubleshooting as explained in None of my CD or DVD drives are recognized.