Yeah , teh hard drives become network drives under my computer on your network machines and you can do all copy and paste and cut commands to and from it
Anyway have a look at this http://www.freenas.org/ i have never used it personaly but i have seen it used and it wokrs pretty welll
lol hardly!
you switch both pc's on. on one you go into network places and find the other ones shared docs. then just store all your documents in that folder. you can do what muz said so it appears as a drive in my computer. then you just click on it and you will see your files. its easy.