Its only about 300meg to download so pretty small
Just go to 'New User' on the main PS3 screen, then set up a new PSN account.
You can enter a fake email address...all you need is a semi made up UK address with correct post code:
2 Brodog Street
Fishguard
Pembrokeshire
SA65 9HT
Then go to maximuscards.com and purchase a UK giftcard which then gets emailed to you instantly