how to theme xfwm4 in gnome

[Shpongle]

Im running xfwm4 in gnome , i like the look of os x based themes and they all work fine with metacity , the theme folders usually have a gtk , a metacity and a xfwm4 folder each. most of the theme works under xfwm except the window borders despite the themes having xfwm sections, could someone please explain how to set the window borders under xfwm4, thanks

heres how xfwm looks at the min,

[Shpongle]

heres how it looks under metacity, it should be able to look like this under xfwm4 too as there is files there for it

[Shpongle]

any ideas anyone?