You're welcome. Glad to hear you got it working!
The CMD (command) prompt, on a Windows 7 system, is a relic from the DOS days, when it was a file called COMMAND.COM
Historically, its main job was to load programs from disk into the computer's RAM and then point the CPU chip to the starting point of the program so it could run. When the program was finished, the operating system would re-load COMMAND.COM and you'd be back at the command prompt again.
A program-loader such as this is called an executive.. because it executes programs. The programs that it loads have previously been converted into binary (ones and zeros--which is what your computer really understands) and stored on the disk that way.
COMMAND.COM also had some built-in features that didn't require it to load another program into memory.. most of these had something to do with the file system (list files, rename files, delete files, etc.).
Just what you've always wanted to know, right?