Heat oven to 350°F. In medium bowl, stir cream cheese spread, pepper Jack cheese and jalapeño peppers until well blended; set aside.
Between pieces of plastic wrap or waxed paper, place each chicken breast; gently pound with flat side of meat mallet or rolling pin until about 1/4 inch thick.
Place melted butter in shallow dish. Place crushed corn chips in separate shallow dish. Place about 1/3 cup cheese mixture on center of each chicken breast. Roll chicken over filling, tucking ends to enclose filling; secure with toothpick, if necessary. Dip filled chicken breasts into butter, then coat in crushed corn chips. Place in ungreased 8-inch square (2-quart) baking dish.
Bake 40 to 45 minutes or until chicken is no longer pink in center.