You can use the Explorer to easily open up a DOS window to a specific directory.

From Explorer Option Menu select File Types
Highlight the object for Folder - NOT File Folder
Click the Edit button
From the 'Edit File Type' panel click the 'New' button
Action is '&Goto DOS Prompt'
Application used is C:\windows\command.com /k cd %1
Select OK, then Close and Close.
Now from Explorer secondary (right) click the folder you want to go to in DOS
From the menu select 'GotDOS Prompt' (or hit G) and you are in that directory with a DOS windows
For Win NT 4.0 same tip, but substitute cmd.exe for command.com)