sorry i dont think i can help you there, i trid windows vista for 1 day but my computer dident agry with it but if you have a proporly set up network there should be a network drive listed somewhare. wait do you have a home network or a company/organization network.
if you have a home network you may have to set up a drive for shareing on that network by enabling your whole drive to be shared or you can buy a network drive frome staples.
if you have a company network a shared drive should be on your computer unless your using a laptop from home than you should ask your network admin to set up a network if not already. you can also ty posting in the vista forums, i think your in winows.