Text editor won't let me edit conf files. How do I?

[Linux Media]

>>> you can also use this command:
>>>
>>> su -c 'gedit /etc/your_file.conf'
>>> Password:

>> Using su with GUI apps can lead to X11 sockets and the like getting wrong
>> permissions and screwing up that user's configuration. YMMV.

> hence my total confusion as to why fedora no longer ships gksu??

I use kdesu to start programs as root. But I don't know if it's safer 
than other methods or anything like that. But it has worked for me for a 
while.

Rocco