Undead or Alive

Undead or Alive A Zombedy is a 2007 comedyhorror film of the Western genre. Directed by Glasgow Phillips, and written by Phillips and Scott Pourroy, the film stars Navi Rawat, Chris Kattan and James Denton. The film was later acquired by Image Entertainment, a deal that included both theatrical and home video rights.

Luke Chris Kattan, a cowboy living in the town, plans to marry a saloon girl. On arriving at the saloon to propose to her, he encounters Elmer Winslow James Denton, who has just arrived in town, and discovers that his princess is a prostitute. He picks a fight with Elmer until Sheriff Claypool Matt Besser, who owns the saloon, jails them and steals 500 which Elmer is carrying. In the adjacent cell is Ben, awaiting his hanging the next morning. Elmer and Luke escape and lock Deputy Cletus Chris Coppola in the cell, where he is bitten by Ben.Luke and Elmer find the sheriff and the prostitute having sex. They steal all the sheriffs money and make a getaway. When the sheriff releases Cletus from the cell he is bitten by him. The next morning hang Ben and assemble a posse to pursue the two fugitives. ........

Source: Wikipedia