How to add new variables in prestashop welcome email

[delite]

I would like to add new variables like city, country, phone and address in Welcome email Prestashop 1.4, i tried adding them in mailalerts.php by adding:

'{address}' => $customer->address1,
'{city}' => $customer->city,
'{country}' => $customer->country,
'{phone}' => $customer->phone,

but no luck,

Adresa: {delivery_address1}
Oras: {delivery_city}
Tara: {delivery_country}
Telefon: {delivery_phone}

Please help

[delite]

anyone with a solution ?