For all of you tempted by the building of a province file, I give you the subdiv codes so that you don't have to dig in the pninit.php file :

Ontario : 111
Quebec : 123
British Columbia : 19
Alberta : 3
New Scotia : 106
Manitoba : 79
Saskatchwan : 127
Newfoundland : 97
New Brunswick : 94
Prince Edward : 121 (under the name Prince Edward Island)
NorthWest Territories : 104
Nunavut : 293 (IMPORTANT see below)
Yukon : 167 (under the name Yukon Territories)

IMPORTANT NOTE : There is a problem for Nunavut as I can't find it in the current release. So I will add it as a new subdivision number 293.
But if somebody build a Nunavut package it will not work until the next release if you don't add the lines
$sql = "INSERT INTO $subdivtable VALUES('Nunavut','293','15');";
$dbconn->Execute($sql);
in the file pninit.php

If You build a province package file, don't forget to put something like

<?php

$city_name = 'The province name';
$city_version = 1.0;
$subdiv_id = the subdiv code given above;
$country_id = 8;
$region_id = 5;
$city_data = array();

At the begining !!

Good work
If you work on a Province, post on this forum to avoid wasting your time redoing the same work several times !!