How to remove Norton Antivirus 11 files from my PowerPC G5 with OS 10.5.8?

My G5 won't boot up due to a Symantec message that interrupts the boot process. When I click okay nothing happens but the spinning beach ball of crash.  I can access the G5 as a hard drive from my MacBook Pro laptop and remove files, but the RemoveSymantecMac command only works on the boot drive, so I cannot use it.  What I need is a list of all files and their locations so I can manually delete EVERYTHING or at the very least the file that runs during boot up.