more and more people are owning a cfw now and now getting banned as much i know there must be a tut on how to do this in other pages
but here is a more recent one
I have provided links to download the pkg's so there is no .exe to do a virus scan
Run Webman/multiman for game (if your using USB hard-drive)
Run the latest PSNinja link:
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Now once you have PSNinja you need to press Wipe History, Replace History, Make History Files read Only, Make History Writable, Clear Browser History, Hide From Friend & Be Seen Again
Now once done you need to run PSNPatch link:
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Hold X system reboots
Now you can sign in and load your game
Prevent getting banned do NOT be signed in going on any home brew pkgs