Create your FritzingTest work folder in brd2svg and create a brds folder inside of that.
Add a brd file, in this case lets do the DRV2605 Breakout:
You don't need to add the SCH file. Also, note that the board file will be modified so only work on a copy of your board file!
Run python run.py in the brd2svg directory. It will run the preprocessor and application once or twice:
You'll now have all the part files in FritzingTest