mount_smbfs '//hda/movies' ~/Desktop/hda/movies
mount_smbfs '//hda/music' ~/Desktop/hda/music
The mount commands will ask for password appropriately.
A more general form of this mount command for a given user and a domain is like this:
mount_smbfs '//home.com;user@hda/share' ~/Desktop/hda/share
You have to replace home.com for your own domain in your network and user for the user you want to access the share as.