Just enable Shipping/Buyer's Address in the settings of each product that should trigger collection of the buyer's address during checkout. You may want to add these lines to your View Cart code on every page, just before the "// -->" line in the standard code you got from Seller Admin, to customize the "Ship to country" label in the cart:
function EJEJC_config() {
EJEJC_POSTCALL=true;
}
function EJEJC_shown() {
jQuery("#country1").attr("innerHTML", "Your Country");
}