If your network is properly configured, shares will show up in My Network Places. Simply create an identical account on all machines, enable file and print sharing by running the network setup wizard on said machines, and then create shares.
I set up the C drive (of computer 1)to share and then mapped it to a folder. I can see the folder on #1 computer. However on #2 computer it is not in "My Computer". I want to be able to access the #1 C drive (folder) from computer #2. How do I do this? Both machines are WXP.