You can use a firewire cable to boot up your laptop as a firewire hard drive. Upon starting up the laptop, connected to the computer via firewire, hold down the T key and your laptop becomes a hard drive you can drag files to.
The other option is go to any computer store and buy a "crossover cable" which is really just a more fancy ethernet cable. Then you can network your two computers by going to the GO menu with both computers plugged in and on. Just make sure File Sharing is enabled on both computers.