Opportunity with multiple currencies

I´m working in a solution for a client, he works with multiple currencies, for example dollar, euro, mexican pesos. He needs that every opportunity and every offer or quote can be have multiple currencies, for example the first quote is in mexican pesos, but the client say "I wanna pay in dollar", so we do another quote but this is dollar, all inside of the same record of the opportinity.

The problem is that when I create a new opportunity I have to select one currency, so We only can use the product list in that currency.


Any suggestion about how can I do it?