In older releases I had some other files that aren't included anymore,
notabbly:
- a version for SpamAssassin 3.0x
- a 'hashhackserver' called, perl-based server to set up your own iXhash
hash database
- a 'MyiXhash' called plugin that plugs into a MySQL database instead of
using DNS

If you still run SpamAssassin 3.0.x then look into updating your SA
installation rather than using this plugin.

If you are interested in the other two tools: Contact me per PM (dirk at
ixhash dot net), but also have a look at Jonas Eckerman's HashCount plugin
(to be had at http://whatever.frukt.org/graphdefang/HashCount.pm) which
might just be what you need.

Dirk