I just finished reading the script of the movie and so far it seems to be pretty solid. They seem to have gotten down everything you would expect out of Grand Theft Auto, murder, car theft, possession of drugs, a crazed European main character that everyone wants to believe is Russian even if they are not, rear ending a car better than your current one and stealing that car, and raping your ex-girlfriend/her mom.
Here's a leaked script, it seems to be very dead on the game. Comments and reviews welcome.
Spoiler alert, the movie ends with a BUST, not WASTE.Fan's review:
JBassit: damn thats one good aventure
JBassit: at least he went down in style
FPSB | Reaper: yeah
FPSB | Reaper: BUSTED
JBassit: should have just stabbed himself at the end though rofl