How do I use GTK+ resource settings for GTK+ applications when not in a GNOME environment?
GNOME applications get their GTK+ resources from themes and the corresponding theme engine. If you would rather run your GTK+ applications in a non-GNOME environment then you will need to create a file named ~/.gtkrc-2.0. To use the widgets from a GTK+ theme when in a non-GNOME environment, simply include the theme’s gtk-2.0/gtkrc in your ~/.gtkrc-2.0.