For icon: https://github.com/NVIDIA/nvidia-settings/pull/56
--- a/nvidia-settings/doc/nvidia-settings.desktop
+++ b/nvidia-settings/doc/nvidia-settings.desktop
@@ -5,5 +5,5 @@
 Comment=Configure NVIDIA X Server Settings
-Exec=__UTILS_PATH__/nvidia-settings
-Icon=__PIXMAP_PATH__/nvidia-settings.png
-Categories=__NVIDIA_SETTINGS_DESKTOP_CATEGORIES__
+Exec=nvidia-settings
+Icon=nvidia-settings
+Categories=System;HardwareSettings;