|Or something like this which is likely to be cheaper than a USB enclosure if it is only going to be used once.|
Just plug the adaptor and power supply into the hard disk and the USB into the lapot and the drive will appear as a removable drive.
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BTW Guapo. You don't need a router to connect two computers together in a netwrok. All you need is a crossover cable. Even if there were three you still wouldn't need a router, a switch will do it. You would only need a router if you wanted to connect these computer to the Internet.
So if both computers have an netwrok interface card, connect them together via a crossover cable.
Give one and address of 192.168.1.1
The other 192,168,1,2
Both a netwrok mask of 255,255,255,0
No need to worry about the gateway address. Then you can transfer you files over the netwrok. However, the USB option might be better as it is a lot simpler.