Writers Guild Foundation

I'm an Extra, Actor, and Screen writer: my Partner was an Editor,
Camera man and Screen Writer, and we both wrote a Script called party tonite, But in order to register it we could only use one name,
so I let my partner put script under his name, and he died about ten year's ago so I need to put the script in my name in order to sell it, because I recently had a stroke and can't Produce the script any more.
So I need to know how I can go about putting the script in my name
and if I can to everything on the Internet.