For glue, use a vinyl cement called thinspread, trowel with a 1/8 v notch,,sets up in 45 mins or until adhesive does'nt transfer to your finger, 1 pint is all you need... For prep, scrape and sweep , If small chunks of the tile prove tough to remove, use a hair dryer the heat will release the bond....After you set the tile you can walk on it...