HKCU\
The Network key stores information about mapped network drives. Each subkey in Network represents a drive that is connected to the computer and will be reconnected when the user logs on again. The subkeys are named for the drive letter to which the drive is mapped. The system adds a Drive letter subkey to the registry when you map a drive and select the Reconnect at Logon option. The entries in the Drive letter subkeys store data that is used to reconnect the drive.
To map to a network drive, from the Tools menu select Map Network Drive. In the Folder box, type the path to the drive, and then click Finish.