How do I change my screen name?

A question about : How do I change my screen name?

I seem to be able to change EVERYTHING apart from my screen name. Is this possible without having to re-register? If I DO have to re-register, how do I delete my original profile?

Best answers:

• You need a very good reason for the forum team to change it for you.
  Best if you just register again and forget you ever had that profile as it can't be deleted.
• Thank you, torbex
• ....sorry....torbrex