Why did they tell you that is the way to get an image out of Poser?
That is how you set it for your render preferences.

To save out an image, rendered or not, all you do is use the drop down menu--- file/export/image--- and save where you want.
Best if saved as png.

I have SR3 and it cleared up a problem with Poser crashing all the time.
But I don't have your problem.

Let me introduce you to my multiple personalities. :)
     BluEcho...Faery_Light...Faery_Souls.