To install, 

1) edit Makefile.PL so that the LIBS line is correct

2) If your perl 5.002b2 resides in some place other than
/usr/local/bin/perl, edit *.pl to contain the correct place

3) type
perl Makefile.PL
(with perl being 5.002b2 or greater)

4) type
make

If you want to install Gann, additionally do

5) type
make install

