Hose off the existing concrete area and scrub it with concrete stain remover and a scrub brush. Dislodge any debris in the crevices and rinse off the cleaning solution with a hose.
Use a trowel or putty knife to fill in cracks and holes with vinyl patching compound.
Mix mortar in a wheelbarrow with pre-made mortar mix and water. Use a paddle bit and power drill to stir the mortar until it is thick and shiny.
Begin at one end of the concrete space and spread 1/4 inch layer of mortar over the first section with a notched trowel. Only apply enough mortar to fit four pavers at a time so it can't harden before you set the pavers.
Spread 1/4 inch of mortar over the bottom of the first paver stone and press it into the mortar layer on the concrete.
Continue spreading 1/4-inch layer of mortar on the bottom of the stones and laying them flush beside each other in your pattern of choice. Use a bubble level to verify the pavers are level with adjacent stones, and adjust them in the mortar as necessary. Wait two days for the mortar to harden to the concrete and paver stones.
Spread fine sand over the walkway with a stiff brush and push it into the joints. Sprinkle the area with a hose to pack the sand down further, and then add more until the joints are filled.
Seal the stone pavers with sealant and a roller brush to preserve both the natural color of the pavers and the sand joints.