Right now due to the forum defaults, I think it is set so only moderators can change the title to threads. Although I thought I have seen some thread titles changed by regualr users....I wont know unless they say they can.
That means the best thing you can do is to Private Message a moderator to change that title. If that thread is in the battlefield, I cant change it for you, Im the only mod that cant edit threads in that particular forum. Try Bigben or 36 Chambers.