Command Line Switches for Windows Explorer
Right click Windows Explorer/Properties and type this into the Target path:
To have C: open (No folders)
%SystemRoot%\Explorer.exe /root, C:\
To have C: open expanded: %windir%\EXPLORER.EXE /e,c:
To have C: open and My Documents:
%windir%\EXPLORER.EXE /e,c:,%HOMEDRIVE%%HOMEPATH%\My Documents
For it to open to My Documents:
explorer /n,/e,%HOMEDRIVE%%HOMEPATH%\My Documents or
C:\WINDOWS\explorer.exe /n,/e,%HOMEDRIVE%%HOMEPATH%\My Documents
To have My Documents open only (No folders):
Explorer /root, c:\Documents and Settings\%username%\My Documents
If you wish to have Explorer open at My Documents on another drive, you
would use:
%SystemRoot%\explorer.exe /e, f:\My Documents
To have another Drive letter assigned to opening: D for example:
C:\Windows\Explorer.exe /e, d:\
d:\ can be modified for any folder/sub-folder you like. As in:
%SystemRoot%\Explorer.exe /e,d:\My Stuff
The /e switch tells Windows Explorer to open in the two pane explorer mode
and the c:\ tells it to open in folder C:\. If you omit the /e switch,
Windows Explorer opens in a single pane view.
HOW TO: Have Windows Explorer Default to the %SystemRoot% Drive When Started
http://support.microsoft.com/default.aspx?scid=KB;en-us;257518
Command-Line Switches for Windows Explorer
http://support.microsoft.com/support/kb/articles/Q130/5/10.asp