How to display one single and same currency in Cart and Checkout?

Hi,

I would like to use two different currencies to be displayed on single product pages. But on both cart and checkout I would like to display the currency which is not the default currency.

It works great just for the Checkout page, but not for Cart, where it is still displayed the default currency, not the other one.
Is any way I can tweak the plugin settings to display ONLY one currency (which is not the default one) in the cart? Or at least is there any solutions in shopping cart to have both currencies and not the default one (like on single product page)?

Thank you,
Valentin