skin1/customer/main/product.tpl
find these lines:
Code:
<span class="product-price-value">{include file="currency.tpl" value=$product.taxed_price tag_id="product_price"}</span>
<span class="product-market-price">{include file="customer/main/alter_currency_value.tpl" alter_currency_value=$product.taxed_price tag_id="product_alt_price"}</span>
Replace with
Code:
<span class="product-price-value"><sup>{include file="currency.tpl" value=$product.taxed_price tag_id="product_price"}</sup></span>
<span class="product-market-price"><sup>{include file="customer/main/alter_currency_value.tpl" alter_currency_value=$product.taxed_price tag_id="product_alt_price"}</sup></span>