The MPC 1000 is a sampler and sequencer in one. That means that you can run midi tracks alongside audio drum tracks and the MPC will keep them in perfect sync.
The way you convert midi tracks to audio is by plugging both the MPC and the Korg module into your Behringer mixer, getting a mix you like, then burning it to a CD. The midi tracks will be right there with your audio tracks.
For recording your mix try the freeware program Audacity ---
LINK --- and if you are lacking a way to get your mixer into the computer, I suggest
this.