1/ First of all, check that the library povanim23X_0x  (the current name could be 234 to 237) is in a directory in wich the python dll that comes with  Blender can access. That is to say, either in the "Blender.exe" directory or  in the one in wich the file you want to export is localized.

2/ To do the exportation. 

3/ to use the result of exportation. 

   Firstly the function of export opens, or creates if  necessary, a directory. This directory can be : 
 

                disk:\file's directory\povanim 

  or: 

               disk:\file's directory\\meganim 
 

  All the new files are arranged/stored in this directory. Considering that " basename " is the name of the original  blender file, one will find there: 

        ' main' +basename+' pov' 
        ' INI' +basename+' ini' 
        ' cam' +basename+' inc' 
        ' mesh' +basename+' inc' 
        ' lamp' +basename+' inc' 

CAUTION! VERY IMPORTANT! 
To render the image, you do need to open and run the ' INI' +basename+' ini' with povray or megapov.

 Knowing that OBJcorNAMELIST = basename+nom object, you will find the files there: 

              OBJcorNAMELIST+' norm.inc' 
              OBJcorNAMELIST+' verts.inc' 
              OBJcorNAMELIST+' faces.inc' 
              OBJcorNAMELIST+' nindice.inc'
              OBJcorNAMELIST+' text_list.inc' 

This process saves time and storage room when we 
make Povray/megapov do an animation computation ; as the normals indices group, as well as the whole faces definition and even the text_list won't change.
 

See the detail of the structure available on the page: 
files structure.
Others advantages are described in the part dedicated to postprocessing in megapov