There are so many possible ways this can go down. From reading between the lines on rumors and just wild specualtion this is what I have come up with.
#1 Trade Rozier and Jackson for Hayward S&T and 2nd rd pick
#2 Trade Crowder for Hayward and a 1st rd pick
#3 Trade Crowder and Bradley for Hayward and Favors
#4 Trade Smart to Knicks for Hernengomez and a 1st, then Sign Hayward, then trade Hernendomez, Bradley, Crowder and a non nets pick to Memphis for Gasol
My guess would be option 1 or 2 happens.