You can drag and drop songs directly from Windows into DJ Twist & Burn, but the songs do show up at the end of the song list that way, too.
We're probably not going to be making any significant updates to DJ Twist & Burn. It's what you would call a legacy product that this point. We're concentrating our efforts on some of our other projects, like Mixcraft.
We've considered making real time DJ software, but there didn't seem to be enough demand for it.