Maestro
these are the basic requirements to run final cut studio 2 (including final cut pro 6.0)on your computer.
even if you get it run rendering processes could be trouble, i would recommend you got to these address :
http://www.apple.com/finalcutstudio/specs.html
and compare your computer with specification.
good luck
A Macintosh computer with a 1.25GHz or faster PowerPC G4, PowerPC G5, Intel Core Duo, or Intel Xeon processor
1GB of RAM
An AGP or PCI Express Quartz Extreme graphics card (Final Cut Studio is not compatible with integrated Intel graphics processors)
A display with 1024-by-768 resolution or higher
Mac OS X v10.4.9 or later
QuickTime 7.1.6 or later
A DVD drive for installation