(Request) Option to Rename the "personal folder" button on Start8?

When you use your e mail address to log into your user account on windows 8 the name shown under your account picture is not what I would like it to be shown. Instead I would like it to show a nick name but because I am logging onto my user account with a e mail address it shows "supta_000. Is it possible to add a option to rename the name displayed below the account picture which I believe is the user account "personal folder".

Now understand that I do not want to actually change the name of the "personal folder" for my user account. I just want Start8 to show my real name or any nick name I want to give it.

So basically if your email address to log into your user account is  suptata43@yahoo.com you will see "supta_000" under your user account picture on Start8. I however would love an option to change the displayed name to anything I want like "superman" for example if I wanted to.

I hope you understand what I mean