Setting OpenGL render engine in a script

Hi, I'm new for DAZ. I found that the rendererList doesn't contain OpenGL. And I want to render a image by OpenGL and Iray.  Because of the lack of OpenGL, now I must save two Scene files, one for Iray and another for opengl. Is there a simple way to change Iray to OpenGL in a scene using script?

var oRenderMgr = App.getRenderMgr();
var oRenderList = oRenderMgr.getRendererList()
for(i=0;i<oRenderList.length;i++){
	print(oRenderList[i].getName())
}
/* output
NVIDIA Iray
3Delight
Scripted 3Delight
*/