MyBB Community Forums

Well, this may not be the best place to put this thread since it really doesn't have to do with MyBB but a plugin that's used with it, but I'm hoping someone can point me in the right direction or help me out. I basically need to center the tabbed menu, the one from MyBB Central, as well as round the corners of the tabs, that way it's somewhat different than what most people have.

Any advice?