Meanwhile, melt 2 tablespoons butter in large skillet on medium-high heat. Add garlic and shrimp; cook and stir 3 minutes or until shrimp turn pink. Remove shrimp from skillet; cover to keep warm.
Add next 4 ingredients and remaining butter to skillet; cook on low heat 5 minutes or until cream cheese is completely melted and mixture is well blended, stirring constantly with whisk. Stir in shrimp.
Drain pasta; place in large bowl. Add sauce; mix lightly.