how to record a dj mix on audacity and cdjs

can anyone show me how to record a dj mix on audacity and cdjs ??

ive maneged to record straight from my behringer vmx300 with a usb cable and the mix sounds a little dorsrted how do i stop that

Distortion is usually due to the signal level being too high somewhere.
Ensure that the meters on the Behringer vmx300 do not go into the red, and set the recording level so that there is some clear space between the waveform and the top / bottom of the track.