To get Mac's to 'talk ' to Windows computers which aren't servers. You'll need 3rd party sofware like COPS or DAVE. (never heard of P.C. DOCs) This may not be true with Mac OS X( Since it's based on Unix)
You'll only need the normal network connectivity hardware to setup the network.
Hope this helps 
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Comment heard from a Klingon programmer.
"Our users will know fear and cower before our software! Ship it! Ship it and let them flee like the dogs they are!"
[This message has been edited by Ghost_Hacker (edited 05-31-2001).]
Ferengi Rules of Acquistion:
Rule # 47 Don't trust a man wearing a better suit than your own.