i've just got my ps2 back from a company in the UK who install messiah chips (not the clone...but the original chip)
it took only a few days to get it back, and it works brilliant......
i can play everything including dvd copies with no problems at all.
here's their web site:
www.psxmodsuk.co.uk
give 'em a try, they're excellent for value and service!!
andy