Darth Solo said:

;-)

Question: having never burnt a DL disk to date can i trust nero 8 to set the layer break correctly, or will i need to set it manually

If you're burning the ISO then that's all there is to it and it should retain the layer change. When I used CDBurnerXP there was no option to set the layer change and I just burned the ISO as is. When I checked it out on a DVD player the layer change was in the exact same place it is on the commercial SW discs - after Tarkin's "Terminate her. Immediately" line.

I also have Nero 8 but as I've said before I don't ever plan on burning DL discs with it because of the problems I've had with other versions of Nero making DL coasters.