It's pretty easy, all you gotta do is click on your display name, click "Change display name" And then type whatever you want in the box.
Options, display name, x
first of all go on to my profile and then edit and it should have a link or somewhere on the page that tells you your questions and said change hope this helps
the same as on normal msn
First you go to pick a profile image and then it gives you choices of images. Pick one and it will show up on your msn square profile