Slony-I installation Help

I have downloaded slony-I(slony-I-2.0.2R-pg84.zip) from the site
http://developer.pgadmin.org/~hiroshi/Slony-I/. But when I tried to
create a new Replication cluster using PgAdmin(After doing all other
steps mentioned in http://www.pgadmin.org/docs/1.8/slony-example.html )
the 'OK' button in the Dialog is in disabled state. Also a message
'Slony-I creation scripts not available;only joining possible'. When I
tried to join the cluster ,it also get failed because no cluster is
created at all.

Please provide the address from which a Complete Installation package
for Slony-I, compatible with the PostgreSQL 8.4 will be available.

Please note that I am using Windows XP.

Thanks & Regards,

Vishnu S