Hello
Morphos is free (AFAIK) for classic systems with PPC acceletators (as the machine you are planning to use), the new versions cost money but they only work on PPC-only hardware (Efika, Pegasos, PPC Macs...), so maybe the Morphos option is not exactly what you are thinking since the version you can use is (again, AFAIK) no longer supported.
Regards,
Efren