Open the Start menu and select Computer.
Click Map network drive in the toolbar at the top of the Computer window.
Select a drive letter in the drop-down menu.
Type "http://" and server's IP address and port. For your iPhone it is http://127.0.0.1. This information is displayed on top of the “Online” tab on your iPhone/iPod Touch.
Make sure the “Reconnect at login” box is unchecked.
As a result you should get network drive mounted and ready to use.
Make sure that is running.
Open the Start menu and click Computer
Find the network drive under Network Locations and double-click it.
After the drive is set up, if you decide to enable a password, or change your current username or password for you will need to reconnect Wi-Fi drive.
Open the Start menu and select Computer.
Find the network drive under Network Locations.
Right click on the network drive and select Disconnect.
Set up the drive again as described above.
Attention: sometimes your device may change IP address inside WiFi network. In this case you need to reconnect to the WiFi Drive again using the new IP address.
Alternative: for Vista 32-bit you can also use popular WebDAV client NetDrive (www.netdrive.net, free for non-commercial home use) to connect to your device. In many cases it is more simple and reliable solution than standard client.