Command Prompt Portable is a simple utility that allows you to easily add a customizable command prompt to the PortableApps.com Menu.
It has built in support for the command line interpreters on both Windows 95/98/Me and Windows 2000/XP/Vista as well as the ability to customize using simple DOS commands by editing the .bat file within CommandPromptPortable\Data\batch after you've run it once. You can customize the prompt, colors, window title, columns and more. A basic batch file is included with some simple settings.
You can also pass in paths you'd like the command prompt to start in by starting CommandPromptPortable.exe with a command line parameter of the path (Windows 2000 and up only). Advanced users can enable auto-complete by following the directions within the Other\Source\readme.txt file.