How to open an offline image in a browser window from in-game?

Hi,

I need to have the ability to print an image from my game (PC Standalone build), the easiest way I can think of doing this is to have the image open up in an external browser window, then the user can just print it from there.

However the image won't be online, so the following script which I use to open online links isn't going to work -

    public void OpenURL(string url)
         {
             Application.OpenURL(url);
         }
     }

Is there a way of doing this? Maybe a way of modifying the above script to tell it a specific image file to open instead of a web address?

Or alternatively, any suggestions of another way for a user to print the image would be appreciated.

Thanks in advance.