I've got a Powerbook, G4, and have already upgraded to Leopard. (after some turmoil)

The problem now is that some of my software is no longer supported on Leopard. (Final Cut Pro 4)

Is is possible to run these two systems. I saw thread to dual boot Leopard with Tiger... is the same possible with Panther (10.3)

Are the instructions the same (partitioning, etc.) If so, my machine is only 80 gigs... what would be an appropriate partition?