I don't know anything about the DP02CF - but I'm pretty sure that however it is that you get the track stems (and they need to be cohesive stems) off of the DP02 to your computer - they need to be in .wav format before you can load them onto the DP-24SD via the Audio Depot. Important: the bit depth and the sample rate of the .wavs need to match the song setting that your loading them to. Meaning if your .wav stems that come off of the DP02 are 14.1 kHz/16 bit - the song that you've created on the DP-24SD needs to be 14.1 kHz/16 bit.
Hope this helps.