The following codes can only be enterd at a "Universal  Code Input" terminal within 
the game; the fist one is located in the "Infiltration" stage.

JANITOR- Unlock "Gray Hulk" cheat 

SANFRAN- Unlock "Hulk Transformed" in Movie Art

PITBULL- Unlock "Hulk vs. Hulk Dogs" in Movie Art

FIFTEEN- Unlock "Desert Battle" in Movie Art

NANOMED- Unlock "Hulk Movie F/X" in Hulk Unleashed