Change Shippent method's default cost message

[iwanna]

Hello  ..

Could somebody help me change the default cost message in Shipping Method when the cost is zero ?

Doing Ispect Element I got this code:

Code Select Expand

<label for="payment_id_2">
<span class="vmpayment">
<span class="vmpayment_name">Delivery</span>
<span class="zero_vmpayment_cost"> Packing and Shipping Costs: 0.00 €</span>
</span>

I went to componets/com_virtuemart
and in plugins/vmpayment and plugins/shippment but I couldn't find it 

[GJC Web Design]

there is no such class as zero_vmpayment_cost in a std VM that I know of -- is this a 3rd party template or payment plugin?