This is probably the driver you are looking for.
My hard drive crashed.  I have finished installing everything on a new drive that I have from my Dell installation CDs.  However, in the Device manager, the Ethernet Contoller shows the the drivers are not installed.  I can't seem to find them anywhere on the Dell web site. Can someone point me to the drivers?   when I pull the cover off of the computer - the outside of the Ethernet connection says "418D-J51   10/100 BT" jill
Ethernet driver for Dimension 4600