Came across an old but useful post:

When you open the Windows 7, Vista or XP start menu, on its right side you will see some system personal folders displayed. On this RHS part of the Windows Start Menu, you have the option of displaying User, Documents, Games, Music & Pictures Folders.

While the first 3 are commonly use, most may find little use for the last two folders; and would instead like to replace them with their oft accessed folders like Downloads or any other.

Visit WinVistaClub for details on how to replace the Music & Pictures Folders in Start Menu with folders of your choice.