Basically, you start your chain like this:

internet-->modem-->router

Most internet modems have their bios set to be a DHCP server, you must turn this off. If you give me more info I will help you there (ISP and hardware). Next, you must have you router connect through the modem, which should be PPoE. This should be pretty easy to configure in your D-link.

Next, you can assign static IPS for every box in your house if you want, I just set them all to get their IPs automatically. But if you do assign manually, they all have to be on the same subnet.

For example, let's say that your router is the gateway and its ip is 192.168.1.1 and subnet 255.255.255.0. Your other boxes should follow the scheme 192.168.1.x with no two x's being the same.

Next, to have a network. If you followed the above, every computer will have internet access. Your next step is to turn off all firewalls/IDS/ and Windows Firewall. Then. make sure all your computers have unique id names and they have the same workgroup. Change this by right clicking my computer and go to computer name (you will have to restart). Next, all the files/folders you want to share must be shared. To share them, right click and go to shareing (you can figure out the rest).

Finally, access each box on the network, just type in their unique name \\name, or go just type in your workgroup name in explorer. Post again if you still need help.