Run several 3D applications on Optimus if present.

Applications/20~Games/20~Action_Games/~nexuiz~Nexuiz

@@ -1,4 +1,6 @@
 #!/bin/sh
 
-exec nvrun nexuiz $@
+which nvrun && exec nvrun nexuiz $@
+which optirun && exec optirun nexuiz $@
+exec nexuiz $@
 

Applications/20~Games/20~Action_Games/~sauerbraten_client-bin~Sauerbraten

@@ -1,3 +1,5 @@
 #!/bin/sh
 
-exec nvrun sauerbraten_client-bin $@
+which nvrun exec nvrun sauerbraten_client-bin $@
+which optirun exec optirun sauerbraten_client-bin $@
+exec sauerbraten_client-bin $@

Applications/20~Games/Arcade_Games/~etracer~TuxRacer

@@ -1,3 +1,5 @@
 #!/bin/sh
 
-exec nvrun etracer $@
+which nvrun exec nvrun etracer $@
+which optirun exec optirun etracer $@
+exec etracer $@