Conina on 28 September 2018
I'm sorry to say that, but most of your 13 steps were pointless.
The PS3 is regionfree, so all you had to do was to open an US account (additonal to your normal account, no reformatting necessary) and buy it with this new user account. PSN US credit is also available at amazon.com, no need to go to dubious sellers.
Then it is already playable on your PS3.
To also play it on the Vita, you had to log off you EU account and log into the US account (no reformatting the memory card necessary). Then your EU games are temporary locked, but get unlocked after switching accounts again.
