Magento Programmer needed - Custom dual currency issues

I have an existing site which has Cdn and US dollars on it. In the USA and internationally the buyers see US prices and Canadians see Cdn prices. This is already in place. Exchange rate is not used, rather, we have two prices for each product. Two Problems - 1. In our Sales (Discounts) we can only use one currency. I need this fixed so we can enter a Cdn sale price and a US sale price. 2. We need to accept two currencies in our merchant account. We have a US$ PIN# and a CDN$ PIN#. However, in the merchant settings we can only enter one PIN. I need a second PIN added so we can accept both currencies into their respective accounts.