Another Ozi Explor question.

NO,

DiscoverAus is a proprietary product which can be downloaded to the GPS and also run on a Laptop, if you have the Laptop version.

Why would you want to "use" it in OziExplorer.

You can set up your Laptop to run DiscoverAus concurrently with OziExplorer and swap between the two products. I do this occasionally on mine, but prefer Ozi with the NATMAP reference maps for a better detail. to do this you need another software product called GPSgate to allow the sharing of the GPS input port between multiple applications.

If you have DiscoverAus on CD rather than the Topo SD card you can install it on your Laptop. If your version is the Topo SD card it cannot be loaded on a Laptop.

The inability to load the updated DiscoverAus software onto a PC was the reason I "dumped" the proprietary Magellan product and went to OziExplorer in the first place. Now I use it all the time and hardly need to run DiscoverAus on the PC.
(DiscoverAus is running on the GPS anyway and provides its own "moving map" feature, but it's not as good as Ozi)

i have discover aus streets and tracks on sd card and it was very simple to load it on my laptop, just hook up gps via usb cable and transfer state by state