[shan]

ive done something similar in the past but like this

create an extra button to print your invoice and add an extra var

ie - orders.php?orderid=blah&showcc=Y

then on the invoice wrap the cc code part in this

{if $smarty.get.showwcc eq "Y"}
cc details
{/if}

this is a very basic example and the button code is made up but should give you an idea of how to achieve it