The easiest approach is to insert it with multiple outputs.
DO NOT insert EZ Drummer as a Simple Instrument Track. Insert with the following selections:
MIDI Source Track
All Synth Audio Outputs-Stereo(this gives you the eight outputs).
Synth Properties Page (this is the EZD GUI, and you will need to see it to set your drums to the individual outputs).
Once EZD has completed loading, click the OPEN MIXER button.
Click on any of the Outputs, then click Multichannel. This will route the drum outputs to a default set.
You can also direct a given drum to a particular output using the mixer.
Be aware that this mimics mics on an acoustic set, and the drums are not totally isolated from each other, so you may see some bleed.
If you set it up right from the git-go, it's easy.
If you try to expand it out from the wrong insert selections, you have a bit of a battle on your hands.