Originally Posted by MTK358
I figured it out:
gtk-window-decorator --metacity-theme theme-name --replace
Perfect! This was the answer I needed.
Also keep in mind to put quotes around the theme-name if the name in question has spaces in it.
gtk-window-decorator --metacity-theme "Cobra OSX" --replace
Themes themselves can be placed in the .themes folder
In my case the theme in question was stored under /home/sysghost/.themes/Cobra OSX