double post for FUCK YOU, RULES.
I purchased a SIIG USB audio jack to enable my laptop to have 2 audio ports. Then, I downloaded ASIO4ALL to enable my laptop to function as if it had an ASIO soundcard, which lets me create aggregate devices of sorts. Doing this, and PERFECTLY LEGITIMATELY ACQUIRING Traktor Pro, configuring the audio settings, lets me cue and preview tracks on my headphones while sending the master track/signal to the other audio jack which is hooked up to an external speaker system.
In short, I can DJ live now.