Forum:Shortcut to peaceful tour of entire city?

Believe it or not, the main reason I bought GTA IV was to peacefully tour the wonderful model of Liberty City which the clever Rockstar people built. Is there a simple cheat whereby I can do this? The key seems to be ending the police blockade of Algonquin / Manhattan. (I devised ways to get into it alive with the blockade in place, but could never manage to shake the police, save by hiding underground forever.)

