No this is not possible, EU-Only the EU region & US-only the US region.
So if you wanna play in the US you have to buy the game again and then your possible to play there.
(but the US is very laggy to me, so i would stay in the EU)
Edit: I read it wrong -_-
Yes it is possible, just buy an US psn card and make an US account and ready to go!
Last edited by BOY070 on Thu Mar 07, 2013 2:20 pm, edited 1 time in total.