Lexus Gs Nav Dvd Hybrid

[sartask]

OK....I am trying to burn a new "hybrid" Nav DVD with two different country CDs. Is the loading.kiwi file the only one I need to copy over to get the system to recognize the Australian maps? There seems to be an issue with the disk reader not being able to read the Australian DVD outright. Some of the posts I've read on different sites mention that the US maps DVD is a different region than Australia, just like movie DVDs. However, someone in Germany who imported their Lexus from the States was able to burn a hybrid disk using the US files with German maps but didn't post how he did it. Can someone PLEASE help explain how to burn this hybrid disk??