Linux Crunch posted a guide about customizing your windows buttons in KDE 4.4

There are five buttons there without any real benefit to me at least. I need only two of them the minimize one and close button. For maximize the window I use double click. The method (which I will tell you) is applicable to all KDE distributions (i.e. kubuntu, debian, opensuse, mandriva, and so on).
1- From kick-off menu, open System Settings.
2- Open Appearance control module.

  How do you customize your windows buttons in KDE 4.4