Depending on how much cheese sauce you want, cut up Velveeta into cubes into a microwave safe bowl and add just a little bit of milk. Microwave checking and stirring every 20 seconds until cheese is melted and smooth. Pour cheese sauce down the middle of enchiladas but don't over-do it or they will be soggy. Spoon the remaining salsa over the velveeta. Throw in a 350 degree oven for about 20 minutes to warm.