What in the world is he saying. I got 2 Answers for you.
If you want your name to get changed to Tim'. Log in to
http://pacommunity.co.uk/. And click on your nick in the upper right. And you'll get "Update Profile" Click on that. And look for this "Community Name (Name shown on the PAC website, can be used to login)" And delete your nick from there and type in your new nick. Wait till it gets approved and use your nick as Tim'.
The second asnwer.
Just try both the nicks. First get In-Game with the nick [TZ_T]Kieth. If it didn't work. Then Log in with the nick [TZ_T]Kieth. But if you are not in TZ. I advice you to change your nick as soon as possible(ASAP)
Regards,
Maddy