I found myself looking for my "Visual Studio 2005 Command Prompt Here" on my directories today. I went in search of the .inf file I got off of Scott Hanselman's site. This works in Vista, which is great! Though for what I was compiling I also needed to be running as an Administrator. This lead me to randyrants.com where he has the solution. He also shows how to get the prompt on your drives.
The trick is to use the "runas" key, then you can use the same command used for the other prompt.
[HKEY_CLASSES_ROOT\Directory\shell\runas]
@="Elevated VS 2005 Command Prompt"
[HKEY_CLASSES_ROOT\Directory\shell\runas\command]
@="C:\Windows\system32\cmd.exe /k cd \"%1\" && \"C:\Program Files\Microsoft Visual Studio 8\Common7\Tools\vsvars32.bat\""
