[For 1.8] Style Your Nick

[Destroy666]

Maybe cause I'm using 1.6?

Probably. Honestly I haven't really tested on that version, so I changed the inaccurate text in my 1st post to the information I add to my every plugin: "it may work in 1.6 after some changes". But unfortunately I don't do anything on 1.6 at this moment (since it will reach EOL sooner or later, definitely until the end of this year), so I won't provide the required changes - you may ask someone else though, shouldn't be too hard to do (numeric settings to text, fix the tab, replace $mybb->get_input() with $mybb->input etc.).

Or I may look at it myself, but only as a paid work and somewhere around the middle of the next month (not much time now).