If you add them to your start up items, and save the password into KeyChains.
So, mount the drive, click on System Preferences, Accounts, Click on Start Up items tab, then drag and drop the shared drive that is on your desktop to the list area. Now, when you start up your computer, it will try to mount that drive with the saved password that is in Keychains.
I use this to mount 3 drives that are shared from my Linux Server.