Mohammed Berdai has a quick tutorial posted about getting a full installation of PostgreSQL and phpPgAdmin up and working in an XAMPP environment.

XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl, plus many additional modules. The whole package is well integrated and can save a lot of time and hassle for the inexperienced web developer. [...] phpPgAdmin is a web-based administration tool for PostgreSQL, exactly as phpMyAdmin for MySQL.

It's a simple three step process (with a few sub-steps inside each) to get the system up and running - basically: install XAMPP, install PostgreSQL and install phpPgAdmin.