Just for the troubleshooting record, I have resolved a bit of a head-scratcher installing the Gofriller Cello.
The install process would complete but the Gofriller Cello_001.nkx monolith would not transfer to the selected folder on an internal SATA target drive with just over 2 gB free space showing.
As I was composing an SOS post for this forum, I thought to move some VI library files (about 5 gB's worth) off the drive to create extra space and try again. This time, the install completed properly.
Transferred some of the displaced files back to the drive (leaving about 5 gB free) and all are happy now. Seems the installer needed somewhat more than 550 free mB to get the job done.
Running OSX 10.4.9 on a dual 2.7 gHz PPC G5 Powermac, 8 gB RAM.