Normally they are released for both the US and EU Vita. If not, EnigmaBlade is correct.Just make a US PSN account, and download it via the PS Store
Virtually leave that account for a while. Not using it. Similar to an fb deactivation.What do you mean by deactivate?
http://manuals.playstation.net/document/en/psvita/psn/aboutactivate.htmlWhat do you mean by deactivate?