This is a script that can be used to insert fields into an existing Enzo dataset.

For an example of how to run, see the end of the insert_fields.py file.

Alternatively, you can do, assuming insert_fields.py is in your Python path:

from insert_fields.py import *
fields_to_add = []
bdict = add_field('DD1701', fields_to_add)

This must be run in the dataset directory where the parameter file 'DD1701' and
all of its data resides.  I strongly suggest you backup your dataset before 
using this.  It has not yet been tested with a variety of precision settings.