Hi Light Dude.
The SD3 has an Auto patch feature. meaning that if you have it on it will always address to the next channel.
You can turn this auto feature off and set any fixture with any DMX channel.
You don't have to use 32DMX channel fixture.
You can look for your the fixture profiles you need here : http://www.elationlighting.com/pdffiles/other-profiles.zip
or create you own profiles using this software: http://www.elationlighting.com/pdffiles/SD2D%20Library%20Creator.zip