Hmm, from what I remember, you must make 2 computers' workgroup the same, make 2 network cards' IPs within the range of 192.168.0.x, and then name each computers uniquely. Then with file and print sharing installed, you should be able to share data by making some folders sharable within the network. All those networking thing can be done in Network in Control Panel and the sharing folder thing can be done by right-clicking the folder and choose Sharing...
I know there are many more guides out there that is more elaborated, but for a quick guide, that's what you can do. Hope this helps.
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