Bill S.,
Now this is gonna sound simple .. but it is .. from your 'start' button, go to help and networking .. 8)
Essentially, you're gonna connect the two network cards with the appropriate cable .. either the flat-wire, or rg58U ..
Go to one 'puter, and using WinDoze Explorer 'share' out the drive (make it available for sharing by the other 'puter.)
Go to the other 'puter, hit "start" and choose 'search.' One of your choices should be 'another computer on the network' or some such ..
Once you find the other 'puter you're going to need to go to WinDoze Explorer on the second machine and 'map' a network drive .. that'll name the drive from the 'shared' machine...
(Incidentally, you'll need to have loaded networking capability in WinDoze on each computer.)
The search should find the other computer, and the file you'd offered.
Now .. that's an oversimplification, and WinDoze is gonna conspire to aggravate the livin' beJeesus out of ya .. but follow the yella brick road on your 'help' screens and it'll all come out ..
Incidentally, if you're using the older co-ax cable you must have the 50 ohm 'dead ends' on a t-fitting at each computer. Won't work, otherwise, and only a 50 ohm resistor is gonna do it ..
I know you'll have questions .. and don't be shy!
Cheers!