Solid Hardwood, Engineered and Laminate Flooring - laminate floor

My home is built on a concrete slab. Atop that is plywood and then comes a Mirage wooden floor. I would like to install a Mannington laminate floor, the type that does not require nails or glue. I live about 50 miles east of NYC. How should I prepare the subfloor?

tear it all out or lay on top of the wood.
make sure it is all flat.

Thank you for your prompt response. What I am concerned about is that if I lay the laminate over the current wooden floor with a moisture barrier, and when the warm air comes in contact with the cold of the concrete floor moisture may form causing the laminate to rise. Would I be better off ripping out the wooden floor down to the concrete and then follow the manufacturers instructions as to how the sub floor should be prepared? Again, thank you for your assistance. By the way, what do you think of the Mannington laminates?

mannington is good. they have cheap types too, so make sure you buy the right quality.

yes it is better to have a fresh substrate if you want to do the work.