Thoroughly clean the floor with hot water, cleanser of your choice and a mop. Let the floor dry, and then sweep it carefully.
Vacuum the surface of the floor with a shop vac. This will remove any small particles of dust that the broom may have missed.
Start laying the vinyl planks in one corner of the room. Unlike square vinyl tiles, which should be installed in the center of the room, planks should be installed like hardwood flooring. Line up the top edge of the vinyl plank. Remove the peel-and-stick backing. Press the plank down firmly. Continue down the edge of the wall until the first row is complete.
Cut the starting plank for the next row with a utility knife. Trim the starting plank by at least 2 feet. In order to look like hardwood, the plank lengths must not match up. Install the entire row, trimming the last plank as necessary.
Finish laying the floor. Alternate every other row with a shorter sized plank to vary the installation. Do not use hot water or cleaner on the floor until the adhesive has cured completely -- usually about one to two weeks.