Difficulty installing Wine

[Steven Vollom]

From the following website:  http://www.winehq.org/download/deblenny, I chose 
Method 1:  Add the repository.  I entered ~$ sudo su and got Root.  I then 
typed in:  sudo apt-get install gedit and installed Gedit.  I then added the 
command:  gedit /etc/apt/sources.list and got the following:  

steven at Yeshua:~$ sudo su
[sudo] password for steven:
root at Yeshua:/home/steven# gedit /etc/apt/sources.list
No protocol specified

(gedit:10053): Gtk-WARNING **: cannot open display: :0.0
root at Yeshua:/home/steven#

I am over my head again; can someone help me?  Thanks!

Steven