I think we must mightily resist the notion that anything which can't fit on a bumper sticker doesn't constitute a good answer. Failure to recognize reductionism as something opposed to Truth has led to wholesale accommodations to the world by the church. It has also resulted in milky preaching, children's church, de-emphasis on catechism, etc. To capitulate to the presupposition of the questioner is to lose the chance to help him. One's view concerning evolution may or may not be related to a given individual's personal salvation, but the idea that we can reduce our Christian world and life view to that alone which touches salvation is to embrace infantilism.
Salvation is like the alphabet, it is the beginning.
That is all impossible unless the fundamentals are grasped. But the foundation is not the superstructure. Similarly, salvation is the beginning of a new world view in which all of life is reinterpreted in terms of Christ and Scripture. To say that something as basic as Creation has nothing to do with salvation, then, is like saying that food has nothing to do with life. The only thing that matters is that you are born.