Heat gas or charcoal grill. To make foil tray for shrimp, cut 18x12-inch sheet of heavy-duty (or nonstick) foil. Fold up sides and corners to create pan with sides. If using heavy-duty foil, spray foil with cooking spray.
In small bowl, mix salsa, honey, cumin and 1/2 teaspoon of the chili powder; set aside. In foil tray, toss shrimp with butter, remaining 1/2 teaspoon chili powder and the seasoned salt.
When grill is heated, place foil tray with shrimp on gas grill over medium heat or on charcoal grill over medium coals; cover grill. Cook 8 to 10 minutes, stirring shrimp or shaking tray occasionally to turn shrimp, until shrimp turn pink. Serve shrimp with salsa mixture.