To add new fields to the VIDF (programming experience necessary) :

The file you will need to edit are :

vidf_defs.h
read_idf.c
GetFromNewVIDF.c
dump_vidf.c


1) Decide on what the keywords should be.  It is recommended that you make 
   them somewhat meaningful to the reader of the VIDF even if he uses a 
   builder.  Also decide whether it is an float, int, string, int list, 
   char list, or string list.

2) Add the keyword to a sample VIDF in the TEST directory.

3) Determine a "what" value to be used by ReadVIDF.  (i.e. _PHI_METHOD).  
   It is recommended that you use something similar to what is in the PIDF.  
   Make it all uppercase with a leading underscores and add it to the file 
   "vidf_defs.h" as part of the VIDF_DEFS enumerated type.

4) Make a default case for it for the old VIDF and place it in the 
   appropriate place in "read_idf.c".

5) Add the "what" value to the routines VIDFCheckReturnType and 
   GetFromNewVIDF in "GetFromNewVIDF.c".

6) Update the dumper (dump_vidf.c) to display the new value.