I need help with the wiremod winch.

I am trying to make a winch system that increases and decreases when I use the w and s keys. I have looked for a tutorial for this, but I have found nothing. If anyone can point me toward a tutorial or give me basic instructions I would greatly appreciate it.

Basically the same as this, except you will use the winch instead of hoverballs of course.
http://www.facepunch.com/showthread.php?p=17845979#post17845979