In order to make use of the crossover cable both machines will have to be assigned to the same network. For example, in
IP addressing you might want to have one machine addressed
192.168.0.1 and the other
192.168.0.2. That will setup the initial network. Next you will want to setup something called
Samba. This will help you setup your Linux machine as a
file share server. From there you will have to setup shares so that the files you want can be accessed.
You will have to do some of your own research but most of this information can be found at
www.samba.org. There are also many walkthroughs like at
http://www.linuxhomenetworking.com/ which is my favorite administration site. Good Luck!