In principal, as this is a pure perl module, you could just copy the IxHash.pm file into a lib/Tie directory, say under where your CGI programs are located, and then add the location to your @INC with:

   use lib './lib';
[download]

in your programs. On some platforms you may be forced to give the full path to the 'lib' directory as the notion of '.' might be different for a CGI program.

/J\