Navigating through the File Open or Save Dialog box with just the keyboard is relatively easy by typing simple keystrokes into a 
Navigate into next Directory
When any File Open or Save dialog box is opened, just type (period period) and hit the Enter key and you’ll notice you are suddenly in the next directory up.
Navigate by Relative Path
You can type .. in the File Open Dialog box to navigate to the directory above the current one and then start typing the name of a folder or file name and also you could use two or any number of levels to continue to traverse up the directory tree.
Navigate with Shell Folders
There are a list of shell folder shortcut names (desktop to go to the desktop folder) included in Windows Vista (or XP) that will let you navigate in the File Open Dialog box with shell folders.
Navigate with Environment Variables
The built-in environment variables allow you to quickly navigate to a Program Files folder folder. For instance, you could type:
%programfiles%
or %appdata%, which takes you to the C:Users<username>AppDataRoaming folder
When you open a command prompt and type set in the File Open dialog box you can see a full list of these variables.
Note: surround the variable name with percentage signs as shown above.
Navigate with UNC Paths
You can still open and save directly from a shared folder, despite not having a drive letter mapped to another computer. You must type in the UNC path to the server the syntax:
ServernameSharename
Navigate with FTP server
You can even connect to an FTP server to open a file by using the following syntax:
ftp://user@servername/path/
On entering the FTP password you can browse the FTP site like a local folder. However, this method is relatively slow in comparison to similar paths.
Navigate with Full Paths
You can just start typing the full path to a file in the File Open Dialog box which might take longer than some of the other options.
Navigate with Copy and Paste
You can navigate with a new option called Copy as Path in Windows Vista, if you hold down the shift key while right-clicking on a file or folder, which will copy the full path of the folder to the clipboard.
