[greenjeens]

Sandbox instructions didn't seem clear for a case where one would want to test a new third party software with a Major Apple update.

Can't I just make a second clone, and see if everything plays together OK before commiting?

I want to test Apple Quicktime 7.1.2 and a new Toast 7.1 version since the last QT update broke my Toasts ability to record Apple Lossless files.
Found intermediate versions that work, currently using Toast 7.0.2 and QT 7.0.4 . Panther 10.3.9.
There was no downgrade for QT at that time, there is now. I'm scared of QT updates that don't allow easy downgrading. Running a full archive and install achieved the downgrade, but it was a huge pain.

Suppose, the other option is to put the energy into finding someone who is running the same versions, in the same way, on Roxio forum.

Thanks,
Dave