In a Windows Save dialogue, where there are shortcuts on the left (History, Desktop, My Documents, My Computer My Network Places), I think iot is possible to add new shortcuts to this list. But how?
I think it depends upon your OS. On XP, you use the already open dialog to highlight the new location you want to add to the list, then click on Tools, Add To My Places.
I found out that this is called the 'My Places' bar.
Using my laptop with Windows XP and Office 2007, you right-click in the My Places bar and choose 'Add [name of folder].
Using an office computer, with Windows 2000 and a different version of Office, I don't think it is possible. When you right-click the My Places bar it says 'What's this?'.