The Render Curve Script I made for the Demo Reel Creation class at Full Sail University, it turns all the curves beneath a selected group into geometry that follow the original curves so they can be rendered out in Mental Ray. 

How To: 

1. In your script editor type and run :
    import dvRenderCurve
    dvRenderCurve.gui()

2. Make sure that strokes are visible

3. Select the Group or Object that has all the curves you want to rendered

4. Hit "Preview" 

5. Use the Thickness Slider to change the Thickness of the Curves

6. Hit "Make Renderable"