[X4U] Installing Leopard on an older Mac

[K. Jerry Smith]

Hi, all.

I have a friend who attempted to install Leopard on an 800 Ghz TiBook.  
Officially, the highest version of the OS that can be installed on  
that model is 10.4.11. He called Apple, and was told Leopard would  
install on it, though, and purchased the new OS.

No joy.

There used to be an application/hack that would enable the  
installation of OS X on older G3 Macs. I can't remember the name, and  
am wondering it a version exists for Leopard installation on a G4.  
I've found various means of installation, via the terminal, etc., but  
this is beyond his comfort zone.

Any ideas?

Thanks,
Jerry