You want to move files from Computer A to Computer B and have connected the two computers using a crossover Ethernet cable. Here's how to setup File Sharing:

Computer A

  1. Highlight the HD icon
  2. Press Command-I
  3. In the drop-down menu, select "Sharing."
  4. If file sharing is not on (it probably isn't), you be asked if you want to open the File Sharing Control Panel. Say yes.
  5. In the control panel, start File Sharing. This may take a couple of minutes.
  6. Next, open the Users & Groups Control Panel.
  7. Select the "Guest" icon and click on Open, then select "Sharing" in the drop-down menu.
  8. Check "Allow guests to connect to this computer."
  9. Open the AppleTalk control panel and select "Connect via: Ethernet." Make sure AppleTalk is active.
Computer B
  1. Open the Apple Talk Control Panel.
  2. Select "Connect via: Ethernet." Make sure AppleTalk is active.
  3. Open the Chooser.
  4. Select "AppleShare."
  5. You should see Computer A's HD in the window. Select it.
  6. In the resulting window, select the HD. Close the Chooser.
  7. Computer A's HD should now appear on Computer B's desktop.