I just found these on the imdb page for SH2-Revelation 3D:
Peter Outerbridge ... Travis Grady
Jefferson Brown ... Detective Santini
Milton Barnes ... Detective Cable
Rachel Sellan ... Mannequin Girl
James Kirchner ... Grey Man / Silent Hill Citizen
Here is the Mexican poster for Silent Hill2
BTW.. The mannequin monster has the ability to turn people into mannequins and uses their arms, legs and heads as body parts.