the gayest thing is leaving a game cause its to laggy or woteva reason then finding / joining the exact same one.. multiple times.. they should give you a few seconds to atleast not join the game
you need to play around with your router so your ps3 is setup as 'nat type-2' instead of type-3, then it will let you host the games.
also the australians only seem to be on at night times
i took the restrictor out of my 33 gtr, it made no differance at all to the drivability, cept it ran higher boost
also you can obviously just change the hose over and keep the original one with the restrictor in it if you ever wana swap back..
turn it off
then turn it on and keep your hand on the power button for like 10 seconds then it will beep, then turn it off / back on and it should work