How to easily invert a .CIT file in Descartes v8i SS4.

What is the recommended method for converting a .CIT file with a White Background/Black Elements to a .CIT file with a Black Background/White Elements?  The current method that we now use is not simple. We've tried different methods in Descartes without any success.

  1. Make note of a vector element references that can be used to move/scale the future inverted image to the original .CIT files' origin/scale.
  2. Use Save As... to save the .CIT file as a .TIF file.
  3. Detach the new .TIF file.
  4. Then we use an application like IrfanView to invert the .TIF file and Save it. 
  5. Use Attach to bring in the inverted .TIF file.
  6.  Move and Scale the .TIF image to the appropriate location and size with reference to the vector elements.
  7. Optionally save the .TIF file as a .CIT image.

Any recommendations would be greatly appreciated by myself and my users.

Thanks!  Dave