Well, you can login to X as root, you just want to be careful, do it as little as possible, and try other options first
You can also see if xhost+localhost is already setup on your system and maybe you can run X apps as root in your user's window. Open up a console, su to root, then type:
And see if it opens it up as root. If it does, cool. Do your thing, save and exit.
If not, feel free to learn about xhost, and/or login as root, startx, do your thing, get out, and do that as little as possible.
I personally use Root's X about, oh, once every other month, for various things. Just wanna be careful with it, and do it as little as possible.