USD and AR$

1) I need the ability to define the currency prefix on my form. My form asks the question to user whether they are a resident of Argentina or not (prices differ based on country of residence). With conditional logic, I take them to page 2 of the process based on their response:

a) If they reside in Argentina, AR$ 450 (space between AR$ and number)
b) If it's nonresident of Argentina, USD 100

Right now, I get $450 as the price format.
But how can I change that option (a) AR$ 450?
And also (b) USD 100?

My form / site requires both currencies, so just resetting the Gform Currency to Argentinian dollars will just give me the inverse problem. I need to set 1 page to have the AR$ 450 whereas another page has the USD $100 pricing format.

I've already reviewed these threads, but none actually have a solution for this:
http://www.gravityhelp.com/documentation/page/Gform_currencies
http://www.gravityhelp.com/forums/topic/currency-symbol-other-than-usd
http://www.gravityhelp.com/forums/topic/add-custom-currency

I understand settings page only allows 1 currency at a time. But there must be a way to at least change the prefix? I think it's worth noting that for my purposes, even though I'm showing products, there will be no transaction performed on the site. So all I really need is that the prefix be change-able? Can you help me change prefix, remove existing prefix and insert my own?