Double-click the Ableton Live desktop icon to open the digital audio workstation.
Click on one of the folder icons on the far-left side of the program window to open the Ableton browser panel. Navigate to the directory in which the WAV file you want to load is saved.
Click, drag and drop the WAV file from the browser panel onto the mixer track labeled "1 Audio" to load it into Ableton.
Repeat the process for any other WAV sounds you want to use. If you want to put each WAV on its own track, press "Ctrl" and "T" together to add a new audio track, then drop the second WAV onto this new track. If you want to put all the WAVs on the same track, drop the second WAV into the slot directly beneath the first WAV.