if you're having trouble using this package and oscommerce2.2ms2...
(for instance i had trouble getting the orders to show in the admin page, and in the customers account history)
there are a couple of dbqueries which didnt seem right...
try replacing line ~ 36 in includesclassesorder.php with....
$order_query = tep_db_query("select customers_id, customers_name, customers_company, customers_street_address, customers_suburb, customers_city, customers_postcode, customers_state, customers_country, customers_telephone, customers_email_address, customers_address_format_id, delivery_name, delivery_company, delivery_street_address, delivery_suburb, delivery_city, delivery_postcode, delivery_state, delivery_country, delivery_address_format_id, billing_name, billing_company, billing_street_address, billing_suburb, billing_city, billing_postcode, billing_state, billing_country, billing_address_format_id, payment_method, cc_type, cc_owner, cc_number, cc_expires, cc_start, cc_issue , cc_cvv, currency, currency_value, date_purchased, orders_status, last_modified from " . TABLE_ORDERS . " where orders_id = '" . (int)$order_id . "'");
and line ~ 29 in adminincludesclassesorder.php with...
$order_query = tep_db_query("select customers_name, customers_company, customers_street_address, customers_suburb, customers_city, customers_postcode, customers_state, customers_country, customers_telephone, customers_email_address, customers_address_format_id, delivery_name, delivery_company, delivery_street_address, delivery_suburb, delivery_city, delivery_postcode, delivery_state, delivery_country, delivery_address_format_id, billing_name, billing_company, billing_street_address, billing_suburb, billing_city, billing_postcode, billing_state, billing_country, billing_address_format_id, payment_method, cc_type, cc_owner, cc_number, cc_expires, currency, currency_value, date_purchased, orders_status, last_modified, cc_start, cc_issue, cc_cvv from " . TABLE_ORDERS . " where orders_id = '" . (int)$order_id . "'");
merry christmas!