One of our payment gateway provider is gspay.com.
GSPAY already published a gateway for CUBECART 5. http://www.gspay.com/docs/modules_rd/cubecart5.zip
The problem is, that this gateway uses the standard currency of our CC shop (which is EURO), while GSPAY can process US DOLLAR only.
If someone sees any chance, to change (code) this gateway in a way that it will process US currency instead of default currency, please let me know.