Scollpane/scrollbar customization

Hi, Is there any way to remove the scroll arrow buttons at top and bottom? I have tried to skin the scrollbar from halo, sample and standard but and removed the arrow button graphics for state skins, leaving the skins empty movieclip. This makes the buttons dissapear but the slider do not go all the way all up or down. Is this the way to do it? Is it possible to remove them at all? Or else what am I doing wrong?

/frank