How to make a keyboard into multimedia keyboard?

[ShotAlive]

How can i make my arrow keys like a multimedia keyboard?
I want left arrow to move song back, down arrow key pause/play and right arrow key next song?

[Geek-9pm]

Please look over this article and see if it has any ideas you can use.
http://www.computerhope.com/jargon/s/shortkey.htm
If none of that helps, come back here and one of the experts can provide more information.

Have you thought about buying a new keyboard?
Windows can support two keyboards at the same time.

EDIT:
Related references for Keyboard Layout and Definition.

http://en.wikipedia.org/wiki/Computer_keyboard
Computer keyboard

Windows
http://msdn.microsoft.com/en-us/goglobal/bb964665.aspx
The Microsoft Keyboard Layout Creator

BSD
http://code.google.com/p/keyboardlayouteditor/
Keyboard Layout Editor
   
The above are global edits of the keyboard. In the case of Multi-Media, use of the application defined shortcuts is more piratical. Example:  WinAmp is a player that allows keyboard definition that works when WinAmp has focus. That way it does not mess up the keyboard for other programs.