start explorer w/ my computer expanded & explorer tags

Run ""explorer.exe/n,/e,::{20D04FE0-3AEA-1069-A2D8-08002B30309D}"" from command, or make a shortcut.
 

Explorer.exe switches (taken from http://support.microsoft.com/support/kb/articles/Q130/5/10.ASP)

Syntax
EXPLORER.EXE [/n][/e][,/root, ][[,/select],]
Switches
/n: Opens a new window in single-paned (My Computer) view for each item selected, even if the new window duplicates a window that is already open.

/e: Uses Windows Explorer view. Windows Explorer view is most similar to File Manager in Windows version 3.x. Note that the default view is Open view.

/root, : Specifies the root level of the specified view. The default is to use the normal namespace root (the desktop). Whatever is specified is the root for the display.

/select,: Specifies the folder to receive the initial focus. If "/select" is used, the parent folder is opened and the specified object is selected.