AFAIK, you wont be able to do it. The region coding allows for the developer to choose, and unfortunatly, the default option is locked. I cant remember where I got that from, so dont take it to heart... but it sounds about right.
not a single person has ever said if that would be the case or not.... the fact that dvd movie region codes can be bypassed on the ps2, action replay, but not games,unless you chip it or use a method to fool the dvd drive (ie swap magic). the game region detection appears to be hardware (system bios) based...
we may have to wait when review systems start to hit... or maybe wait until the system is released to find this out....