Postgresql Supported?

In Administer > configuration > Regions
I get these Postgresql warnings:

    * warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "ec_region" does not exist in F:\Websites\Mirrors\drupal5\includes\database.pgsql.inc on line 126.
    * user warning: query: SELECT * FROM ec_region ORDER BY region_realm, region_name in F:\Websites\Mirrors\drupal5\includes\database.pgsql.inc on line 145.

When I look at the file "ec_region.install" I can see why. All code in the 'pgsql' case that would create these tables is commented out. Does this mean Postgresql is not supported for ec_region? What would happen if I uncomment this code and reinstall?