Move them into the new directory using Microsoft Explorer cut and paste. The ones you have will not need to be done over. Here are the steps in initial setup. Assume Contestk.zip has been stored in your Fractint directory, for example. Move to your Contest subdirectory and unzip Contestk.zip with the -d option to both the Contest directory and create and fill the Contest.big subdirectory.
Updates are easy.
Unpack the new Contestk.zip as above. Par, frm, bat and htm files will be over written. The new GIFs will be created. You must do this so you can move the focus away from the DOS window and the batch file will not stop running. This version is only a gleam in the corner of my eye.