I wouldn't bother with that old unmaintained DBD::PgPP if not necessary.

For DBD::Pg, which is very actively maintained, there is a ppm/binary for DBD::Pg here: http://pgfoundry.org/projects/dbdpgppm/

If you download a local copy and give the local directory to PPM, it should install it without problem.

If some problem persists, don't assume the module DBD::Pg is at fault, it's probably something else: read the postgres log, it will probably bring enlightenment.

Ah, and by the way: PostgreSQL 8.3 Release Candidate 1 is out! You may want to try that - it is already very stable, and full of new goodies: see release notes for 8.3.

For win32: v8.3RC1 binaries

update: 8.3 binaries ( PostgreSQL 8.3 was released 4 february 2008 ).