hi m8,
i dont think this is possible with your current setup.
basicly the game version of your bought game (BLES20, BLES21 or a different one for the US / SA) decide which server you connect to.
So what you can do is buy a european version of the game for your friend (or you buy a US version of the game ) and then you should be able to play a game online with your friend in the US
expensive but maybe worth it.
better said EU versions of the game play EU versions of the game.
and US / SA versions of the game play US / SA versions of the game.
Greets,
Maurice