The descriptions may vary depending on your edition.
You need the computer name you checked when you register the destination in the machine. Write it down in "Name of the transmission destination computer" on the setting information sheet.
For Mac OS X 10.6.8, select [System Preferences] > [Network], select the network service to use, check the name in the NetBIOS field in the detailed setting, and then write the name down in "Name of the transmission destination computer".
An example of creating the folder named "share" is covered here.
You need the folder name you created when you register the destination in the machine. Write it down in "Name of the shared folder" on the setting information sheet.