Download distext-240.zip (or distext-600.zip if you want to do more 
than 240 distrcits) and extract two files (distdef.dbf and colors.dbf) 
to the c:\esri\av_gis30\arcview\district directory on
your computer or wherever you have arcview installed.  These two files
replace existing files in that directory.  To be safe, the already existing
files in that directory should be renamed as distdef.bak and colors.bak.
That way you have the original files intact and you can put them back if you
ever run into any problems - though you shouldn't.

I tested the districting operation on a Mississippi voting precinct file,
vapvtd200.shp, setting it up to do a
 statewide house plan, and had no
problem deriving a district plan view with
 all the necessary (122) 
assignment tools.  Note that 122 districts makes for
a pretty difficult color scheme.

The two files, both dbase, are used by the arcview districting extension to
assign "unit" values to the statistics table and the map as well as colors
to each district.  The task was essentially to add records to each table
(the ArcView Districting extension files come with 60 records 0 - 59) and,
in one table, the values for units 60 - 640 are added and in the other table
the unit value is assigned a hexadecimal value for the color for each 
record in the table (i.e.
 records 60 - 640).

It turned out to be a fairly simple task, just a  little tedious.  I was
intimidated going in because I had not idea what I had to do and thought I'd
have to do some programming.  I didn't really have to do any programming, I
just had to understand how the program worked.

In any event, I think that despite the districting extensions shortcomings,
it's better than buying a commercial version for $3000.