Hi,

This link here seems to have Authoring Support 1.1.9 available for download:

Authoring Support 1.1.9: Information and Download

And Disc Burner 1.0.1:

Disc Burner 1.0.1: Document and Software

I am not sure what files you need to extract, but I suppose you could try installing the packages like normal. If your machine is upgraded to a G4, it should work?

I hope this helps!

c